Waec Physics 2004 Past Questions and Answers

Question 16:

• WAEC 2004

A body of mass 8kg moving with a speed of 30ms^-1 is brought to rest in 2.5s by a constant retarding force. Calculate the magnitude of the force

A. 240N
B. 96N
C. 20N
D. 9N

Question 17:

• WAEC 2004

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 18:

• WAEC 2004

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 19:

• WAEC 2004

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 20:

• WAEC 2004

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