Physics Past Questions and Answers

The magnitude of the force required to make an object of mass M move with speed V in a circular path of radius R is given by the expression.

A Mr/v
B (mr) ²/v
C Mv²/r
D Mv/2
E Mv/r

Question 482:

A body of mass 4.2kg moving with velocity 10ms^-1 due east, hits a stationary body of mass 2.8kg. If they stick together after collision and move with velocity V due east, calculate the value of V

A 3ms^-1
B 6ms^-1
C 7ms^-1
D 15ms^-1
E 17ms^-1

Question 483:

A body of mass 2kg is suspended from the ceiling of a lift with a light inextensible string. lf the lift moves upwards with acceleration of 2ms^-2, calculate the magnitude of the tension in the string (g = 1Oms^-2)

A 24N
B 20N
C 16N
D 4N
E 0N

Question 484:

A stationary object of mass 4kg is set in motion by a net force of 5ON. If the object attains is speed of 5ms^-1 in time. Calculate the value of t.

A 0.20s
B 0.40s
C 0.63s
D 0.80s
E 1.30s

Question 485:

Two simple pendula x and y make 400 and 500 oscillations respectively in equal time. If the period of oscillation of x is 1.5 seconds, what is the period of oscillation of y?

A 0.53s
B 0.83s
C 1.20s
D 1.50s
E 1.88s.