Answer:
3a) w = mg = 60 x 10 = 600N
b) W = fd = 600 x 10 = 6000J
c) chemical to gravitational potential via the mechanical pathway
4a) W = fd = 200 x 0.5 = 100J
b) chemical to kinetic via mechanical pathway
5a) F = W/d = 40000/20 = 2000N
b) some is transferred into the thermal store, some are dissipated into the surrounding
Step-by-step explanation: