Ch7_2
New Problems
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Make sure to calculate your answers in SI units unless specified otherwise .
1) Two objects of equal mass
m
=
kg
collide head-on. Both objects have the velocity of
m/s
. Calculate the total momentum after the collision
(see sheet 10,16')
. Indicate with a negative (positive) sign whether the result depends (does not depend) on whether the collision is elastic or inelastic.
2)A billiard ball with a kinetic energy
J
makes an elastic collision with another ball which is initially at rest. The collision is such that the two balls have the same kinetic energy after the collision. What is their kinetic energy
(see sheet 18)
? Indicate with a negative (positive) sign whether the result would be the same (different) if the two balls shared the given kinetic energy before the collision.
3) A
gram
bullet with a speed of
m/s
hits the
kg
suspended block of a ballistic pendulum and stays embedded in the block. How high does the struck block rise
(see sheet 21-23)
? Indicate with a negative (positive) sign whether the collision between the bullet and the block is perfectly inelastic (elastic).
4) A billiard ball with a velocity of
m/s
makes an elastic head-on collision with another ball (same mass) which is initially at rest. Calculate the velocity of the struck ball after the collision
(see sheet 25,29)
. Indicate with a negative (positive) sign whether the incident ball after the collision is (is not) at rest.
5) An object makes an elastic head-on collision with another "target" object which is initially at rest. If the ratio of incident mass over target mass is what is the velocity of the incident object after the collision in multiples of its incident velocity
(see sheet 25,29)
? Give the result with the appropriate sign taking the incident velocity as positive.
6) In the experimental discovery of the neutron (the electrically neutral "brother" of the proton ) the ratio of the velocity of the recoiling (struck) proton over the velocity of the incident neutron was . What was the ratio of the neutron mass over the proton mass
(see sheet 25,29)
? (Assume an elastic head-on collision).
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cannot resubmit answers
for the same Problem Set--you must use the 'New Problems' button first.