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Ball A leaves the edge of a level topic with speed Va and falls to the floor. At the instant ball, A leaves the table edge, another identical ball. B. is released from rest at the height of the tabletop and also falls to the floor. It is observed that the balls reach the floor at the same time.

 
a. In each question below. consider the interval that begins when the halls begin falling and ends just before they reach the floor.
i. Is the magnitude of the impulse imparted to ball B greater than. less than. or equal to the magnitude of the impulse imparted to ball A? Explain your reasoning. 
 
 
Ball A 
 
iii. Is the work done on ball B greater than. less than. or equal to the work done on ball A? Explain your reasoning. 
 
b. In each question below, consider the balls just before they reach the floor. i. Is the magnitude of the momentum of ball B greater than, less than. or equal to the magnitude of the momentum of ball A? Explain your reasoning. 
ii. Is the kinetic energy of ball B greater than, less than, or equal to the kinetic energy of ball A? Explain your reasoning.

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Manoj Pandey
Manoj PandeyLv10
19 Mar 2021

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Related textbook solutions

Physics: Principles with Applications
7th Edition, 2013
Giancoli
ISBN: 9780321625922

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Three balls are in water. Ball 1 floats, with half of it exposed above the water level. Ball 2, with a density less than the density of water is held below the surface by a cord anchored to the bottom of the container, so that it is fully submerged. Ball 3, of same radius as ball 2, but of greater mass, is suspended from a rope so that it is fully submerged.
Which is true for Ball 1? Choose the best answer.
 
1) The magnitude of the buoyancy force is exactly one half of that of the ball's weight.
2) The magnitude of the buoyancy force is more than that of the ball's weight.
3) The magnitude of the buoyancy force is less than that of the ball's weight.
4) The magnitude of the buoyancy force is equal to that of the ball's weight.

b. Which is true for Ball 2? Choose the best answer.

1) The magnitude of the buoyancy force is equal to that of the ballʼs weight.
2) The magnitude of the buoyancy force is exactly one half of that of the ballʼs weight.
3) The magnitude of the buoyancy force is less than that of the ballʼs weight.
4) The magnitude of the buoyancy force is more than that of the ballʼs weight.

c. Does ball 2 or ball 3 have a larger buoyancy force?

As shown in the figure (Figure 1) , a superball with mass m equal to 50 grams is dropped from a height of hi =1.5 m. It collides with a table, then bounces up to a height of hf = 1.0 m. The duration of the collision (the time during which the superball is in contact with the table) is tc = 15ms. In this problem, take the positive y direction to be upward, and use g = 9.8 m/s2 for the magnitude of the acceleration due to gravity. Neglect air resistance.

a. Find the y component of the momentum, of the ball immediately before the collision.

b. Find the y component of the momentum of the ball immediately after the collision, that is, just as it is leaving the table.

c. Find Jy, the y component of the impulse imparted to the ball during the collision.

d. Find the y component of the time-averaged force Favg,y, in newtons, that the table exerts on the ball.

 

Here is a popular lecture demonstration that you can perform athome. Place a golf ball on top of a basketball, and drop the pairfrom rest so they fall to the ground. (For reasons that shouldbecome clear once you solve this problem, do not attempt to do thisexperiment inside, but outdoors instead!) With a little practice,you can achieve the situation pictured here: The golf ball stays ontop of the basketball until the basketball hits the floor. The massof the golf ball is 0.0459 kg, and the mass of the basketball is0.591 kg.

a) If the balls are released from a height where the bottom of thebasketball is at 0.741 m above the ground, what is the absolutevalue of the basketball’s momentum just before it hits theground?

b) What is the absolute value of the momentum of the golf ball atthis instant?

c) Treat the collision of the basketball with the floor and thecollision of the golf ball with the basketball as totally elasticcollisions in one dimension. What is the absolute magnitude of themomentum of the golf ball after these collisions?

d) Now comes the interesting question: How high, measured from theground, will the golf ball bounce up after its collision with thebasketball? (Hint: do not forget to add the diameter of thebasketball, 24.15 cm).

http://www.flickr.com/photos/60996491@N03/5592819537/

i found a and b section a)2.253 kg*m/s and b)0.175 kg*m/s but idont know c and d. please help me....

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