physics

A 0.060-kg handball is thrown straight toward a wall with a speed of 9 m/s. It rebounds straight backward at a speed of 6.7 m/s
(a) What impulse is exerted on the wall?
magnitude
0.942 kg·m/s

(b) If the ball is in contact with the wall for 3.0 ms, what average force is exerted on the wall by the ball?
314 N

(c) The rebounding ball is caught by a player who brings it to rest. During the process, her hand moves back 0.40 m. What is the impulse received by the player?
magnitude 0.402 N·s

(d) What average force was exerted on the player by the ball?

  1. 👍
  2. 👎
  3. 👁
  1. For d) you need to use equation: delta p (or impulse)= Average Force * delta t, however, you know neither delta t nor the average force, so you have to find delta t using kinematics.
    Vf^2 - Vo^2= 2a*deltax.
    0-(6.7 m/2)^2=2*a*.4m
    a=-56.1125 m/s^2
    delta v= a * delta t
    -6.7 m/s= -56.1125 m/s^2 *delta t
    delta t= .1194 s
    Plug this in the equation at the top:
    .402 Ns= Average Force * .1194 s
    Average Force= 3.36 N
    Hope this helps!

    1. 👍
    2. 👎

Respond to this Question

First Name

Your Response

Similar Questions

  1. science

    a ball is thrown straight upward and returns to the thrower's hand after 3.00s in the air. A second ball is thrown at an angle of 30.0 deg with the horizontal. At what speed must the second ball be thrown so that it reached the

  2. Physics

    A 1.2 kg object is moving with a speed of 8.0 m/s collides perpendicularly with a wall and emerges with a speed of 6.0m/s in the opposite direction perpendicular to the wall. If the object is in contact with the wall for 2.0m/s.

  3. physics

    A tennis ball has a mass of 0.057 kg. A professional tennis player hits the ball hard enough to give it a speed of 52 m/s (about 117 miles per hour.) The ball moves toward the left, hits a wall and bounces straight back to the

  4. physics conservation of momentum

    A 0.5 kg ball is thrown horizontally towards a wall with a speed of 10 m/s. The initial velocity is chosen to be the positive x-direction for this question. The ball horizontally rebounds back from the wall with a speed of 10 m/s

  1. physics

    A ball is thrown upward at a speed v0 at an angle of 52.0˚ above the horizontal. It reaches a maximum height of 7.3 m. How high would this ball go if it were thrown straight upward at speed v0?

  2. physic

    A girl throws a stone from a bridge. Consider the following ways she might throw the stone. The speed of the stone as it leaves her hand is the same in each case. Case A: Thrown straight up. Case B: Thrown straight down. Case C:

  3. physics

    A tennis ball (m= 0.2 kg) is thrown at a brick wall. It is traveling horizontally at 16 just before hitting the wall and rebounds from the wall at 8 , still traveling horizontally. The ball is in contact with the wall for 0.04 s.

  4. Physics

    A tennis ball with a velocity of 24.4 m/s is thrown perpendicularly at a wall. After striking the wall, the ball rebounds in the opposite direction with a speed of 16 m/s. If the ball is in contact with the wall for 0.013 s, what

  1. Physics

    A tennis ball of mass m = 0.060 kg and speed v = 15 m/s strikes a wall at a 45° angle and rebounds with the same speed at 45° (Fig. 7-29). What is the impulse given to the wall? I know the direction is normal and into the wall,

  2. physics

    two objects are thrown from the top edge of a cliff with a speed of 10 m/s. one object is thrown straight down and the other straight up. if the first object hits the ground in 4.0 second, the second hits the ground in ________

  3. Physics

    An attacker at the base of a castle wall 3.95 m high throws a rock straight up with speed 5.00 m/s from a height of 1.50 m above the ground. (a) Will the rock reach the top of the wall? (b) If so, what is its speed at the top? If

  4. Physics

    A ball is thrown upward at a speed v0 at an angle of 57.0˚ above the horizontal. It reaches a maximum height of 7.4 m. How high would this ball go if it were thrown straight upward at speed v0?

You can view more similar questions or ask a new question.