Question

A mass m = 17 kg is pulled along a horizontal floor with NO friction for a distance d =6 m. Then the mass is pulled up an incline that makes an angle θ = 37° with the horizontal and has a coefficient of kinetic friction μ_k = 0.4. The entire time the massless rope used to pull the block is pulled parallel to the incline at an angle of θ = 37° (thus on the incline it is parallel to the surface) and has a tension T =63 N.

1)

What is the work done by tension before the block goes up the incline? (On the horizontal surface.)

J

2)

What is the speed of the block right before it begins to travel up the incline?

m/s

3)

What is the work done by friction after the block has traveled a distance x = 1.5 m up the incline? (Where x is measured along the incline.)

J

4)

What is the work done by gravity after the block has traveled a distance x = 1.5 m up the incline? (Where x is measured along the incline.)

J

5)

How far up the incline does the block travel before coming to rest? (Measured along the incline.)

m

6)

On the incline the net work done on the block is:

positive

negative

zero

Answer 1