Physics Past Questions and Answers

The diagram above represents a portion of a micrometer screw 20 gauge. What is its reading?

A 3.70mm
B 3.67mm
C 3.50mm
D 3.33mm
E 3.17mm

Question 117:

A girl whose mass is 55kg stands on a spring - weighing machine inside a lift. When the lift starts to ascend, its acceleration is 2ms1. What will be the reading on the machine? (Take g = ms^-2)

A 66 kg
B 55 kg
C 44 kg
D 22 kg
E 11 kg

Question 118:

Two forces each of 4 N act on the opposite sides of a rectangular plate as shown in the diagram above. Calculate the magnitude of g the couple acting on the plate.

A 6.4 Nm
B 3.2 Nm
C 1.6 Nm
D 0.8 Nm
E 0.0 Nm

Question 119:

A force F is applied to a body P as shown in the diagram above. If the body P moves through a distance r, which of the following represents the work done?

A Fx
B F^cosθ/_x
C Fx tanÎ¸
D Fx sinÎ¸
E Fx cosÎ¸

Question 120:

An object R leaves a platform XY with a horizontal velocity of 7m^-1 and lands at Q. lf it takes the same object 0.3s to fall freely from Y to P, calculate the distance PQ.(Take g = 1Oms²)

A 7.30m
B 2.55m
C 2.10m
D 1.65m
E 0.45m.