Physics Past Questions and Answers

A force acting on a body causes a change in the momentum of the body from 12kg ms^-1 to 16kg ms^-1 in 0.2s. calculate the magnitude of the force

A 140.0N
B 20.0N
C 4.0N
D 0.8N

Question 967:

The bob of a single pendulum has a mass of 0.02kg. Determine the weight of the bob [g = 10ms^-2]

A 0.02N
B 0.20N
C 20.00N
D 200.00N

Question 968:

A ball bearing is projected vertically upwards from the ground with a velocity of 15ms^-1. Calculate the time taken by the ball to return to the ground [g = 10ms^-1]

A 1.5s
B 3.0s
C 5.0s
D 7.5s

Question 969:

A loaded spring performs simple harmonic motion with an amplitude of 5cm. If the maximum acceleration of the load is 20cm s^-1, calculate the angular frequency of the motion

A 2 rad s^-1
B 4 rad s^-1
C 5 rad s^-1
D 10 rad s^-1

Question 970:

When compared with water, mercury is preferred as a thermometric liquid because

A Has a higher density
B Has lower specific heat capacity
C Exhibits anomalous thermal expansion
D Contains molecules which have very strong adhesive forces