Question

7.) A 3.0-kilogram steel block is at rest on a frictionless horizontal surface. A 1.0 kilogram lump of clay is propelled horizontally at 6.0 meters per second toward the block. Upon collion, the clay and steel block stick together and move to the right with a speed of
a. 1.5 m/s b. 2.0 m/s
c. 3.0 m/s d. 6.0 m/s
5.) A 600-newton man climbing a rope a distance of 2 meters in 1 second develops power at the rate of
a. 12 W b. 600 W c. 300 W d. 1200 W

Answer 1

1.5 m/s, so the answer would be a)

Answer 2

The answer is choice a

 

Answer 3

Momentum Before = Momentum After 

 (1 Kg) • (6.3 m/sec) + (3 Kg) • (0) = (1 + 3) • (V) 

                  6.3 = 4V 

                 V = 1.575 m/sec 

                 V = 1.6 m/sec (rounded)