1. Knight P11.15 A 150 g ball and a 250 g ball are held at rest with a horizontal compressed spring between them. When released the lighter ball shoots away with a speed of 8.00 m/s. What is the speed and direction of the heavier ball? Draw a "before" and "after" sketch of the situation. Be sure to label the masses, velocities, and the positive x-direction (the coordinate system).
1. Knight P11.15 A 150 g ball and a 250 g ball are held at rest with a horizontal compressed spring between them. When released the lighter ball shoots away with a speed of 8.00 m/s. What is the speed and direction of the heavier ball? Draw a "before" and "after" sketch of the situation. Be sure to label the masses, velocities, and the positive x-direction (the coordinate system).
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Transcribed Image Text:Questions
1. Knight P11.15 A 150 g ball and a 250 g ball are
held at rest with a horizontal compressed spring
between them. When released the lighter ball
shoots away with a speed of 8.00 m/s. What is the
speed and direction of the heavier ball?
Draw a "before" and "after" sketch of the
situation. Be sure to label the masses, velocities,
and the positive x-direction (the coordinate
system).
D1
Transcribed Image Text:Useful information
Conservation of momentum
Ap= 0, or pf = Pi
Simple harmonic motion
x(t) = A cos(wt + o)
v(t) = -Aw sin(wt + o)
a(t) = -Aw² cos(wt + o))
Hooke's law for a linear spring
F=-kx
Angular frequency for an oscillating mass on a spring
FU
k
0 = √ √ =/h
m
Angular and cyclical frequency
w = 2π f
Total mechanical energy for an oscillating mass on a
spring
Emech -kA²
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