A 2-kg piece of clay moving at 4 m/s strikes and sticks to a second 4-kg piece of clay moving at 1 m/s in the opposite direction. What is the speed of the combined piece of clay?

vf =2 m/s

Explanation:

Since the pieces of clay strike and stick together then they must move with the same velocity after the collision between them.

The conservation of momentum says that the initial and final momentum must be equal

where and

Therefore, the speed of the combined piece of clay is 2 m/s

find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2