1- consider a block of mass 2 kg moving in the positive x-direction with a speed

Question

1- consider a block of mass 2 kg moving in the positive x-direction with a speed of 3 m/s at when it is at x=0. the block is subject to the net force.

A) find the work done by the net force on the block as it moves from x=0 to x=2m

B) find the speed of the block at x= 2m

5- consider a 1-D collision between blocks of objects of m1 = 2 kg and m2 = 5 kg. the collision occurs along the x-direction. before the collision m1 has an x-component of velocity of 10 m/s and m2 has an x-component of velocity of -6 m/s. find the x-component of the velocities of the two blocks after the collision if

A) Q = 0 (Recall Ktot,bef - Ktot,aft = Q)

B) Q = 100J

C) Q= 300J

6- find the coefficient of restitution for the collisions indicated in problem 5 parts A) and B)

Explanation / Answer

Q1. force is missing

work done= force x 2 =

final kinetic energy= 1/2 x 2 x3^2 + work done

so, 1/2 x 2 x v^2 = 9 + work done

so, v^2 = 9 + work done

so, calculate v

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