If you perform 10 joules of work lifting a 10-n box from the floor to a shelf how high is the shelf?

a. 1m
b. 2m
c. 10m
d. 100m

A. 1 m

Work done is given as a product of distance and force

Work done = Force × distance

Work done = 10 Joules, Force = 10 N

Distance = work done/Force

               = 10 J/10 N

               = 1 Meter

the chart show the masses and velocities of two colliding objects that stick together after a collision.

according to the law of conservation of momentum, the momentum of the object after the collision is  

answer

1,500

kg • m/s.