Work , energy and power questions | form one Physics

A stone of mass 500 g is lifted through a height of 2 metres. The potential energy gained by the stone is:
A. 100 J
B. 40 J
C. 70 J
D. 10 J

Answer / Solution

UNSOLVED

A force of 25 N is used to move an object through a distance of 1.5 m in one minute. The power dissipated by the force is:
A. 37.5 W
B. 0.625 W
C. 37.5 J
D. 0.625 J

Answer / Solution

UNSOLVED

Heat travels through vacuum by:
A. conduction
B. radiation
C. convection
D. osmosis

Answer / Solution

UNSOLVED

(a) Define the following terms as used in Physics and give their SI units:
(i) Work
(ii) Energy

Answer / Solution

UNSOLVED

A man lifts a load of 20 kg through a height of 4 m in 10 seconds. Calculate the:
(i) Work done.
(ii) Power developed by the man

Answer / Solution

UNSOLVED