Two metal balls with equal masses are suspended, as shown in the following figur

Question

Two metal balls with equal masses are suspended, as shown in the following figure. If the ball on the right is lifted to a height of 2.5 feet and released to collide into the ball standing still, to what height will the resting ball rise? What velocity will the first ball collide into the standing still ball? What is the collision velocity in feet/second and height in feet

A 5 kg ball travels from left to right at 6 m/s. A bat drives the ball in the opposite direction with a velocity of 23 m/s. If the time of contact was 0.06 seconds, what was the average force on the ball? What is the average force in newtons

A car traveling at 25 m/s crashes into a truck with a mass of 8,300 kg stopped at a stoplight. What is the velocity of the wreckage immediately after the crash if the cars mass is 1,700 kg? (assume the truck and car stay together as one object). What is the velocity after impact in m/s

Explanation / Answer

In the first question, there's need of the figure, It has some important information.

Q:2

Impulse,

F*delta_t=m*(v2-v1)=5*(23-(-6))

Average force,

F = 145/0.06

=2416.67 N

Q:3

m1*v1= (m1+m2)*v

v = m1*v1/m1+m2 = 1700*25 /(8300+1700) =4.25 m/s (velocity after impact of wrekage.)

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