A 100 lb block of ice slides down an incline 5.0 ft long and 3.0 ft high. A worker pushes up on the ice parallel to the incline so that it slides down at constant speed. The coefficient of friction between the ice and incline is 0.10.

Question

Find the force exerted by the worker.

(I've found the force of the ice slipping down and friction force, but I have no idea how to find the worker's force...)

N · Answer

Also, how would you find the work done by gravity on the block? Is that a trick question?

admasu · Answer

i do not know

admasu · Answer

A 100 lb block of ice slides down an incline 5.0 ft long and 3.0 ft high. A worker pushes up on the ice parallel to the incline so that it slides down at constant speed. The coefficient of friction between the ice and incline is 0.10.

Find a.the force exerted by the worker.
b.the work done by the man on the block
c.the work by the gravity on the block
the work by the surface of on the inclined on the block

admasu · Answer

A 100 lb block of ice slides down an incline 5.0 ft long and 3.0 ft high. A worker pushes up on the ice parallel to the incline so that it slides down at constant speed. The coefficient of friction between the ice and incline is 0.10.

Find a.the force exerted by the worker.
b.the work done by the man on the block
c.the work by the gravity on the block
the work by the surface of on the inclined on the block

admasu mazaye · Answer

A 100 lb block of ice slides down an incline 5.0 ft long and 3.0 ft high. A worker pushes up on the ice parallel to the incline so that it slides down at constant speed. The coefficient of friction between the ice and incline is 0.10.

Find a.the force exerted by the worker.
b.the work done by the man on the block
c.the work by the gravity on the block
the work by the surface of on the inclined on the block