College Physics
OER 2016 Edition
ISBN: 9781947172173
Author: OpenStax
Publisher: OpenStax College
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Chapter 8, Problem 45PE
Two identical pucks collide on an air hockey table. One puck was originally at rest. (a) If the incoming puck has a speed of 6.00 m/s and scatters to an angle of 30.0°,what is the velocity (magnitude and direction) of the second puck? (You may use the result that
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Consider the collision pictured below. While m2 = 10kg is initially at rest, horizontally moving mị = 6kg with a speed of v1 = 11.8m/s collides with it. After the
collision, the two masses scatter with speeds of v, = 7.8m/s and v,. If 01 = 48°, determine the speed of m2 after the collision, v, =?. Express your answer in
units of m/s with one decimal place.
Note: Please note that we do not know whether or not this is an elastic collision.
Just before the collisbn
Just after the collision
at rest
Answer:
Two identical pucks collide on an air hockey table. One puck starts at rest. The incoming puck has a speed of 6.00 m/s and scatters to an angle of 30.0º. Use the fact that Θ1 – Θ2 = 90º for elastic collisions of objects that have identical masses — in other words, the pucks move apart at a right angle. (a) Sketch the collision, with angles labeled. (b) What is the velocity (magnitude and direction) of the second puck after it is struck?
A ball of mass m₁ = 0.204 kg and velocity 1.571 m/s collides elastically with a ball of mass m₂ = 0.290 kg and velocity -0.393î m/s. Assume the collision is head-on. (Express your answers in vector form.
Due to the nature of this problem, do not use rounded intermediate values in your calculations-including answers submitted in WebAssign.)
(a) Find their velocities after the collision (in m/s).
Vif
2f
=
=
cm, before
m/s
(b) Find the velocity of their center of mass before and after the collision (in m/s).
cm, after
m/s
m/s
m/s
Chapter 8 Solutions
College Physics
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