A block of mass 1 kg is pushed up a surface inclined to horizontal at an angle of 30o by a force of 10 N parallel to the inclined surface. The coefficient of friction between the 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 the force of friction c) increase in potential energy d) increase in kinetic energy e) work done by an applied force
a) Work against gravity equals mgh
5 m= h
50 J WD against gravity
b) The work done against the friction force is fs = 53 J.
d) WD against gravity = 50 J increase in PE
d) The system’s increase in KE is equivalent to the WD = K = WD = 41.340 J
e) Fs = 100J WD by the applied force
