A 95.0 kg football player is standing on a sheet of ice, i.e., there is negligible friction betweentheir feet and the ground. A 0.400 kg football is travelling horizontally at 12.0 m/s towardsthe football player just before they try to catch the ball. (a) If they successfully catch the ball,then how fast does the player and the ball move horizontally after it is caught? (b) If the ballhits the player and bounces off of their chest moving at 8.50 m/s in the opposite direction,then what is the speed of the player after the ball bounces off of their chest? (c) Include adiagram of each of the situations.

Answered: Image /qna-images/answer/48d692c9-fb06-457e-a247-dabdf5e84f2d.jpg

Answered: A 95.0 kg football player is standing…

University Physics Volume 1

18th Edition

ISBN:9781938168277

Author:William Moebs, Samuel J. Ling, Jeff Sanny

Publisher:William Moebs, Samuel J. Ling, Jeff Sanny

Chapter9: Linear Momentum And Collisions

Section: Chapter Questions

Problem 80P: How much fuel would be needed for a 1000-kg rocket (this is its mass with no fuel) to take off from...

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A 100-kg astronaut finds himself separated from his spaceship by 10 m and moving away from the spaceship at 0.1 m/s. To get back to the spaceship, he throws a 10-kg tool bag away from the spaceship at 5.0 m/s. How long will he take to return to the spaceship?
Three skydivers are plummeting earthward. They are initially holding onto each other, but then push apart. Two skydivers of mass 70 and 80 kg gain horizontal velocities of 1.2 m/s north and 1.4 m/s southeast, respectively. What is the horizontal velocity of the third skydiver, whose mass is 55 kg?
A load of gravel is dumped straight down into a 30000-kg freight car coasting at 2.2 m/s on a straight section of a railroad. If the freight car’s speed after receiving the gravel is 1.5 m/s, what mass of gravel did it receive?
To increase the acceleration of a rocket, should you throw rocks out of the front window of the rocket or out of the back window?
Check Your Understanding The soccer player stops after completing the play described above, but now notices that the ball is in position to be stolen. If she now experiences a force of 126 N attempts to steal the ball, which is 2.00 m away from her, how long will it take her to get to the ball?
The motion of a human body through space can be modeled as the motion of a particle at the bodys center of mass as we will study in Chapter 9. The components of the displacement of an athletes center of mass from the beginning to the end of a certain jump are described by the equations xj = 0 + (11.2 m/s) (cos 18.5)t 0.360 m = 0.840 m + (11.2 m/s)(sin 18.5)t - 12(9.80 m/s2)t2 where t is in seconds and is the time at which the athlete ends the jump. Identify (a) the athletes position and (b) his vector velocity at the takeoff point. (c) How far did he jump?
Find the center of mass of a cone of uniform density that has a radius R at the base, height h, and mass M. Let the origin be at the center of the base of the cone and have +z going through the cone vertex.
Check Your Understanding Suppose the second, smaller cart had been initially moving to the left. What would the sign of the final velocity have been in this case?
A large rocket has a mass of 2.00106kgat takeoff, and its engines produce a thrust of 3.50107N . (a) Find its initial acceleration if it takes off vertically. (b) How long does it take to reach a velocity of 120 km/h straight up, assuming constant mass and thrust?
A rocket takes off from Earth and reaches a speed of 100 m/s in 10.0 s. If the exhaust speed is 1500 m/s and the mass of fuel burned is 100 kg, what was the initial mass of the rocket?
For the couple in Fig. 3.28, suppose you were told that the girls mass was three-fourths that of the boys mass. What would be the girls velocity in this case?
Check Your Understanding How would the firework display change in deep space, far away from any source of gravity?

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