Work , energy and power questions | form one Physics

A ball of mass 0.6 kg is kicked vertically up to a height of 6 m. The potential energy acquired by the ball is:
A. 0.36 J
B. 3.6 J
C. 36 J
D. 360 J

Answer / Solution

UNSOLVED

A block and tackle containing 3 fixed and 2 movable pulleys is used to lift a load of 1200 N to a storey 15 m from the ground. if the work done in overcoming friction in the system is 6000 J. Calculate the
(i) Work done by the effort
(ii) Efficiency of the machine
(iii) Effort applied.

Answer / Solution

UNSOLVED

Two types of mechanical energy are:
(i)………..
(ii)……….

Answer / Solution

UNSOLVED

The quantity of energy possessed by a body which causes the vibrations of its molecules is:
A. Temperature.
B. Energy.
C. Heat.
D. Current

Answer / Solution

UNSOLVED

The mechanical advantage of a machine is 4. Find the effort needed to operate a machine of the load 1000 N:
A. 40 N.
B. 2800 N.
C. 250 N.
D. 1999 N.

Answer / Solution

UNSOLVED