Simple machines questions | form two Physics

A lever which has its fulcrum between the effort and the load is said to be of:
A. first class
B. second class
C. third class
D. no class

Answer / Solution

UNSOLVED

Claw hammers and pairs of scissors are in which class of levers? ______________

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

A lever which has its load between the effort and fulcrum is said to be:
A. First class lever.
B. Second class lever.
C. Third class lever.
D. None of the above.

Answer / Solution

UNSOLVED

A system of levers with a velocity ratio of 40 overcomes a resistance of 3000 N when an effort of 100 N is applied. Its efficiency is:
A. 75%
B. 80%
C. 85%
D. 90%

Answer / Solution

UNSOLVED