Ask a New Question

Question

A block is pushed 2 m along a fixed horizontal surface by a horizontal force of 10 N. The opposing force of friction is 0.4 N
(a)How much work is done by the 10 N force?
(b)what is the work done by the friction force
14 years ago

Answers

bobpursley
work= force.distance= 10*2=20n
friction=force.distance=.4*10*cos180=


remember the dot product means times the cosine of the angle between force and distance. In frictions case, the force opposes the displacement (180 degrees)
14 years ago

Related Questions

A 3.0 kg block is pushed along a horizontal floor by a force F of magnitude 19 N at an angle θ = 30°... A 3.4 kg block is pushed along a horizontal floor by a force of magnitude 21 N at a downward angle... A 7 kg block is pushed by an external force against a spring with spring constant 124 N/m until the... A 4.0 kg block is pushed 3.0 m at a constant velocity up a vertical wall by a constant force appli... A 2.0 kg block is pushed 2.0 m at a constant velocity up a vertical wall by a constant force applied... 2.0 kg block is pushed 1.0 m at a constant velocity up a vertical wall by a constant force applied... A 40 kg block is pushed 2.0 c at a conetant velocity up a vertical wall by a constant force applied... A 60N block is pushed up a 2m long ramp. What is the efficiency of the ramp if 30N of force is neede...
Ask a New Question
Archives Contact Us Privacy Policy Terms of Use