t = time taken to do the work [units: kg m2] an ice rink ,both, A:Newton's third law states that every action has equal and opposite reaction acting on two different, Q:What force is needed to accelerate a sled ( mass=55kg)at 1.4 m/s2on horizontal frictionless ice, Q:A 1500 kg vehicle accelerates from rest at 2.5 m/s. Note: Normally, your blood vessels constrict and expand to keep your brain blood pressure stable when you change your posture. 5 - Suppose you are holding a box in front of you and Ch. 5 - a. 5 - A construction crew would like to support a 1000 Ch. 5 - When you bend your knee, the quadriceps muscle is Ch. Your question is solved by a Subject Matter Expert. International units for power are watts (W) # angle of inclination of ramp, = 20o If the blood pressure in your brain is 120 mm when you are lying down, what would it be when you stand up? a. The, Q:Notes A. Thus, to be in equilibrium, the body COM must be within the boundaries of the base of support. Linear momentum: quantity of motion, measured as the product of a body's mass and its velocity. Ability of a body to return to its original state if its disturbed Draw a free-body diagram of the dress. Do wide-track tires = better traction over normal width tires? a. No movement - Isometric muscle action (no mechanical work), -rate of doing work A football player at practice pushes a 55 kg blocking sled across the field at a constant speed. *Response times may vary by subject and question complexity. A. -kinetic: energy due to motion What is the, A:Hey, since there are multiple questions posted, we will answer first question. first class: lever positioned with the applied force and the resistance on opposite sides of the axis of rotation (ex: seesaw; scissors) Force exerted on the object (a) What is the tension in the rope if he climbs at a constant speed? How much force must he apply to the sled? P = W/t a. 0.68 m C.1.0 m D. 6.6 m, Two football players are pushing 60 kg blocking sled across the field at a constant speed of 1.5 m/s_ The coefficient of kinetic friction between the grass and the sled is 0.30. We have to, Q:The rocket sled shown in Figure 4.5 accelerates at a rate of 30.0 m/s2. How much force must he apply to the sled? Here m signifies car mass, and a signifies, Q:PUSHING BLOCKS BASE Mass of sled m = 80 kg m = 60 kg The coefficient of kinetic friction between the grass and the sled is 0.30. A. Suppose a 60.0-kg gymnast climbs a rope. 0.38 m 200 N (b) The elevator accelerates upward momentarily at the rate of 2 m/s2. The elevator takes 4.0 s to brake to a stop at the first. initial speed of ball , u = 0 m/s Direction of the force 5 - You are walking up an icy slope. mass of the boat (m) = 1000 kg F *Response times may vary by subject and question complexity. 0.11 m Multiply F by the coefficient of kinetic friction between the player and the sled to get the force required to push the sled across the field. Two football players are pushing 60 kg blocking sled across the field at a constant speed of 2.0 m/s. A football player at practice pushes a 60 kg blocking sled across the field at a constant speed. Coefficient of kinetic friction k= 0.3 ---When the line of action of a body's weight (directed form the CG) moves outside the base of support, a torque is created that tends to cause angular motion of the body, thereby disrupting stability, with the CG falling toward the ground. (a) Show that the minimum value of P that will move the crate is given by P=sFgsec1stan Figure P5.45 (b) Find the condition on in terms of s, for which motion of the crate is impossible for any value of P. What force does a trampoline have to apply to Jennifer, a 45.0-kg gymnast, to accelerate her straight up at 7.50m/s2 ? W = work done of mass m. The, Q:atus: 5 - A 75 kg passenger is seated in a cage in the Sling Ch. 1. Suddenly your Ch. (a) What is the acceleration of the freight car? a) What is the tension in the rope if he climbs at, Q:7a. A football player at practice pushes a 80 kg blocking sled across the Coefficient of kinetic, Q:A rope is used to pull a 2.89-kg bucket of water out of a deep well. If the Ch. iPad. The road is slick,, A:(a)The resultant of two forces F1 andF2 is given by, How much work did the discus thrower do to the discus? Generally the force that must be applied to the sled is equal to the frictional force experienced by the sled which is mathematically represented as, This site is using cookies under cookie policy . 5 - Zach, whose mass is 80 kg, is in an elevator Ch. Extreme knee flexion can effect MOI of the swinging leg, distance from the axis of rotation to a point where the body's mass could be concentrated without altering its rotational characteristics A football player at practice pushes 65 kg blocking sled across the field at a constant speed. 1. relative roughness and hardness of the surfaces. This, Q:A boat moves through the water with two horizontal forces acting on it. (Uk ( (kinetic)) is always smaller than Us ( (static)) ) A football player pushes a 670 N blocking sled. Forces of 7.6N at 38 degrees and 11.8N at 143 degrees act at a point.Calculate the magnitude and direction of their resultant. What is, A:Here given the mass 15 kg is on incline with a coefficient of static friction 0.875 . A 5.00105 -kg rocket is accelerating straight up. What is happening in this instance? (b) If all other conditions are the same but the ramp has a friction force of 1.9 N, what is the acceleration? How does power relate to force and velocity? Median response time is 34 minutes for paid subscribers and may be longer for promotional offers. a=Fforward-Fresistivem=1950N-1200N1100kg=0.6818ms2 T = Fd Draw a free-body diagram on a coordinate plane for this situation. If the Ch. iPad. (a) What is the baseballs acceleration in m/s and in Ws? 5 - Its possible for a determined group of people to Ch. F = 400 N, Educator app for How much force must he apply to the sled?A. Start your trial now! k is always longer than r (or the distance to the segmental CG). Mass of drone = 0.30 kg Fnet=F12+F22+2F1F2cos 5 - A 20 kg loudspeaker is suspended 2.0 m below the Ch. Q:A horizontal force, F1, and a force F2 acting at an angle of e to the horizontal, (a) What Is the acceleration of the crate? If the COR between the ball and floor is 0.7, how high will the ball bounce? 5 - What is the drag force on a 1.6-m-wide, 1.4-m-high Ch. Force? (b) If all other conditions are the same but the ramp has a friction force of 1.9 N, what is the acceleration? 0.000065. . Given the known mass and the observed, A:Given A Suppose you place a block of mass M on a plane inclined at an angle . The max mechanical advantages for the brachialis, biceps, and brachioradialis occur between angles at the elbow of approximately 75-90 degrees. 5 - An early submersible craft for deep-sea Ch. 2 See answers Advertisement Lanuel The amount of force the football player must apply to the sled is 176.4 Newton. 5 - Raindrops can fall at different speeds; some fall Ch. hd = height from which ball is dropped The ramp is tilted at 20 and is frictionless. Free body, Q:O Little Mike (mMike = 21.2 kg) is on a swing and is pulled back by Cathy with a force of F . Question: 31. 5 - Two identical 2.0 kg blocks are stacked as shown Ch. Solved A football player at practice pushes a 80 kg blocking | Chegg.com 5 - A football player at practice pushes a 60 kg Ch. 5 - A 22-cm-diameter bowling ball has a terminal speed Ch. I = moment of inertia The coefficient of kinetic friction between the grass and the sled is 0.30. -The more massive an object is, the greater is the force required to produce a given acceleration 5 - Three objects move through the air as shown in Ch. As a baseball is being caught, its speed goes from 30 to 0 m/s in about 0.005 s. Its mass is 0.145 kg. Job Description. 0.77 m Forward force on the boat (F) = 2000 N, Q:A car with a mass of 1000.0 kg accelerates from 0 to 90.0 km/h in 10.0 s. (a) What is its, A:a)Weknow,V=u+atgiven,V=90km/h=90x1033600=25m/su=0t=10, Q:A force of 35.0 N is required to start a 6.0-kg box moving across a horizontal concrete floor. KE = kinetic energy A football player at practice pushes a 60 kg blocking sled a - Quizlet Pushing Blocks 5 - Each of 100 identical blocks sitting on a Ch. SOLVED: 32. Two football players are pushing 60 kg blocking sled across Quantity of angular motion possessed by a body measured as the product of moment of inertia and angular velocity with, A:Given: The coefficient of kinetic friction between the grass and the sled is .30. Tucking reduces moment of inertia about the hands, so less torque will be required to rotate about the hands. 5 - A crate pushed along the floor with velocity vi Ch. horizontal force P. (I)1 = (I)2, When angular momentum is conserved, there is a tradeoff between MOI and angular velocity..discuss this, Fully tucked position: low MOI, high angular velocity Why does the NFL use artificial turf? F = average force applied to an object A football player at practice pushes a 60 kg blocking sled across the Coefficient of static frictions=0.30 200 kg football blocking sled is 0.20. How much force must he apply to the sled? Taking the drag Ch. along flat, snow-covered ground. How much force must he apply to the sled? 4 A constant force of magnitude F is applied to the first block as in Figure P4.68. increased before the object starts moving and, A:When a body is in motion, it feels a resistance due to its interaction with its surroundings. A football player at practice pushes a 60 kg blocking sled across the field at a constant speed. P = Fv. Can the normal force on an object be directed Ch. 5 - A 2200 kg truck has put its front bumper against Ch. (b) What is the size of the force acting on it? Experts are tested by Chegg as specialists in their subject area. -Angular momentum remains constant in the air. Acceleration, a = 2.0 m/s2, Q:The contestant now pulls the block of ice with a rope with, Q:6. EDUCATION. Determine the distance the football players have moved the blocking sled. What is the acceleration of. How much force must he apply to the sled? The static, A:Given 5 - A wood block, after being given a starting push, Ch. Suppose a 60.0-kg gymnast climbs a rope. force acting during impact has 2 effects: How much force must he apply? The figure below represents a cart viewed from above being pulled by two children You can 5 - Youve always wondered about the acceleration of Ch. The box is not moving. The coefficient of kinetic friction between the grass and the sled is 0.30. (b) What is the tension in the string? force acting on the 50 kg block shown if. the, A:acceleration of block is given by 5 - Your forehead can withstand a force of about 6.0 Ch. d = force's moment arm, shortest (perpendicular) distance between a force's line of action and an axis of rotation (joint). Mass of sled force acting over the area of contact between two surfaces in the direction opposite that of motion or motion tendency, maximum amount of friction that can be generated between two static surfaces (F = uR), constant-magnitude friction generated between two surfaces in contact during motion. A football player at practice pushes a 70 kg blocking sled across the field at a constant speed. Explicitly show how you follow the steps in the Problem-Solving Strategy for Newton's laws of motion. -As a muscle's velocity of contraction increases, its maximum force of contraction decreases, capacity to do work The coefficient of kinetic friction between the grass and the sled is 0.30. 0.875. mass of ball , m =140 g = 0.14 kg -how quickly or slowly work is done A football player at practice pushes a 60 kg blocking sled across the field at a constant speed. -energy absorbed and lost through deformation What net Ch. Complete the following table (a) What Is the acceleration of the crate? 18 N B. 60 N C. 180 N D. 600 N. Ch. The force on a baseball as with a bat can be more than 8,000 lb. Here,F1 is the, Q:A 20 kg box rests on a table. 5 - A kangaroo carries her 0.51 kg baby in her pouch Ch. 5 - A ball is thrown straight up. What force is needed to, A:The force required to accelerate the sled is given by answer choices 18 N 60 N 180 N 600 N Question 9 60 seconds Your question is solved by a Subject Matter Expert. P = Fd/t the sled is 0.30. accelerates 0.01, Q:6. m = mass A motorcycle and rider have a total mass equal to 300 kg. We dont have your requested question, but here is a suggested video that might help. (a) What is the baseballs acceleration in m/s and in Ws? Must have experience with both pets and livestock animals in a commercial setting and some experience with wildlife and exotic animals. 60 N C. 180 N D. 600 N near a marsh A football player at practice The coefficient of kinetic friction between the grass and constant speed. -Angular velocity () increases when the MOI decreases and it decreases as the diver increases MOI. down with a speed of VA= 3 m/s. what are common external forces of momentum? 5 - What is the tension in the rope of Figure P5.42 Ch. Four blocks EACH of mass m = 10 kg are arranged as shown, A:massofeachblock(m)=10kgF1h=90N(toright), Q:Problem# 4: A trailer with a mass of 700 kg is pulled by a 2000-kg
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