A block of mass 1 kg is pushed up a surface inclined to horizontal at an angle of by a force of 10 N parallel to the inclined surface. The coefficient of friction between block and the incline is 0.1. If the block is pushed up by 10 m along the incline, calculate
a) work done against gravity
b) work done against force of friction
c) increase in potential energy
d) increase in kinetic energy
e) work done by applied force
Mass = 1 kg, = 30, F = 10 N, d = 10m
(a) work done against gravity
= mgh
Work done
(b)
Work done against force of friction
(c) increase in potential energy
This value is equal to the work done against gravity, which we have calculated above in part a. hence, the increase in potential energy = 50J
(d) increase in kinetic energy
= work done
(e) work done by applied force.