# Physics

posted by .

A tennis ball of mass m = 0.065 kg and speed v = 25 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 the wall?

I started out with finding the momentum and doubling it to get the impulse on the wall but that isn't the right answer. What equation do I need to start this one? Does it have to do with the angles they are giving me?

• Physics -

No, that is not right. Only the normal component doubles.

Vfinalnormal =25*.707*2

Force*time=m*vfinalnormal
You have to only dealt with what changed, the momentum normal, and the implulse norma.

## Similar Questions

1. ### Physics

A tennis ball of mass= 0.058 kg and speed= 19 m/s strikes a wall at a 45 degree angle and rebounds with the same speed at 45 degrees. 1. What is the magnitude of the impulse given to the ball?
2. ### physics for scientists and engeneers I

A tennis ball of mass m = 0.065 kg and speed v = 35 m/s strikes a wall at a 45° angle and rebounds with the same speed at 45° (see figure). What is the impulse given to the wall?

A tennis ball of mass= 0.058 kg and speed= 19 m/s strikes a wall at a 45 degree angle and rebounds with the same speed at 45 degrees. What is the magnitude of the impulse given to the ball?
4. ### physics

A 220-g ball strikes a wall with a speed of 7.0 m/s and rebounds with only 37% of its kinetic energy. What is the speed of the ball immediately after rebounding?
5. ### Physics

A 50g tennis ball is thrown with a velocity of 12 m/s. It strikes a wall and rebounds with a velocity of 10 m/s. a) What is the ball's initial and final momentum?
6. ### physics

A ball of mass m strikes a wall that is perpendicular to its path at speed +v and rebounds in the opposite direction with a speed –v. The impulse imparted to the ball by the wall is
7. ### physics!!

A ball of mass m strikes a wall that is perpendicular to its path at speed +v and rebounds in the opposite direction with a speed –v. The impulse imparted to the ball by the wall is 1) 2mv 2)mv 3)-mv 4)zero 5)-2mv
8. ### physics-impulse

A tennis ball of mass m = 0.068kg and speed v = 21m/s strikes a wall at a 45∘ angle and rebounds with the same speed at 45 What is the magnitude of the impulse given to the ball?
9. ### Physics

A 275-gram ball bounces off a wall. The ball stays in a horizontal plane throughout the motion. The ball strikes the wall with a speed of 4.50 m/s at an angle of 𝜃 = 35.0o relative to the wall and rebounds with the same speed …
10. ### Physics

You are hitting a tennis ball against a wall. The 0.057-kg tennis ball traveling at 29 m/s strikes the wall and rebounds at the same speed. Earth is the object of reference. Determine the ball's change in momentum (magnitude).

More Similar Questions