A 65.7-kg basketball player jumps vertically and leaves the floor with a velocity of 1.66 m/s upward. (a) What impulse does the player experience? magnitude N S direction Select--- (b) What force does the floor exert on the player before the jump? magnitude direction ---Select--- (c) What is the total average force exerted by the floor on the player if the player is in contact with the floor for 0.450 s during the jump? magnitude direction ---Select--- Submit Answer

A 1500 kg car traveling to the north is slowed down uniformly from initial velocity of 20 m/s by a 6000 N braking force acting opposite the car’s motion.  Use the impulse-momentum theorem to answer the following questions  What is the car’s velocity after 2.00 s? How far does the car move during 2.00 s? How long does it take the car to come to a complete stop?

An estimated force-time curve for a baseball struck by a bat is shown in the figure below. Let Fmax = 19 000 N, ta = 1.5 ms, and to = 2 ms. F(N) Fmax 1₂ to From this curve, determine each of the following. 0 (ms) (a) the magnitude of the impulse delivered to the ball N.S (b) the average force exerted on the ball KN

A 10 kg lead brick falls from a height of 2.0 m. find its momentum as it reaches the ground what impulse is needed to bring the brick to rest the brick falls onto a carpet 1.0 cm thick. Assuming the force stopping it is constant, find the average force the carpet exerts on the brick. if the brick falls onto a 5.0 cm foam rubber pad, what constant force is needed to bring it to rest?

Problem 6 The magnitude of the net force exerted in the x direction on a 5 kg particle varies in time as shown in the plot. (a) Find the impulse of the force over the 6-second time inter- val (b) Find the final velocity the particle attains if it is origi- nally moving at 1.0 m/s in the same direction at t = 0. (c) Find the change in kinetic energy due to the impulse. Fx (N) 4 3 2 1 1 2 3 4 time t(second) 5 6

MY NOTES ASK YOUR TEACHER A 58.0 kg person running at an initial speed of v, 3.70 m/s jumps onto a m = 116 kg cart initially at rest (see figure below). The person slides on the cart's top surface and finally comes to rest relative to the cart. The coefficient of kinetic friction between the person and the cart is 0.470. Friction between the cart and ground can be neglected. (a) Find the final velocity of the person and cart relative to the ground. m/s (b) Find the frictional force acting on the person while he is sliding across the top surface of the cart. N. (c) How long does the frictional force act on the person? (d) Find the change in momentum of the person and the change in momentum of the cart. N-s (person) N-s (cart) (e) Determine the displacement of the person relative to the ground while he is sliding on the cart. (f) Determine the displacement of the cart relative to the ground while the person is sliding. (g) Find the change in kinetic energy of the person. (h) Find the…

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A 71.1-kg basketball player jumps vertically and leaves the floor with a velocity of 1.87 m/s upward. (a) What impulse does the player experience? magnitude N.S direction ---Select- (b) What force does the floor exert on the player before the jump? magnitude direction ---Select- (c) What is the total average force exerted by the floor on the player if the player is in contact with the floor for 0.450 s during the jump? magnitude direction ---Select--

magnitude of the net force exerted in the direction on a 2.20-kg particle varies in time as shown in the figure below. F (N) 4 3 n 2 1 1 2 3 4 5 (a) Find the impulse of the force over the 5.00-s time interval. I = (b) Find the final velocity the particle attains if it is originally at rest. = N's (c) Find its final velocity if its original velocity is -2.30 î m/s. V₁ m/s avg t(s) m/s = (d) Find the average force exerted on the particle for the time interval between 0 and 5.00 s. F N