Waec Physics 1996 Past Questions and Answers

Question 6:

• WAEC 1996

A rocket is launched from the surface of the earth. If the radius of the earth is 6.4 x 10⁶m and the acceleration of free fall due to gravity is 1Oms^-1 calculate the escape velocity of the rocket.

A. 2.53 x 10⁴ms^-1
B. 1.13 x 10⁴ms
C. 8.00 x 10³ms^-1
D. 4.23 x 10³ms^-1
E. 6.41 x 10⁴ms^-1

Question 7:

• WAEC 1996

The velocity ratio and efficiency of a system of pulleys are 6 and 80% respectively. How much effort is required to lift a load of mass 120kg with this system? (g=10ms^-2)

A. 25N
B. 90N
C. 96N
D. 250N
E. 960N

Question 8:

• WAEC 1996

Two spanners X and Y of lengths 15cm and 20cm respectively are used in turn to give a screw of pitch 2mm one complete rotation. If Rx and Ry are the respective velocity ratios of the spanners then the ratio Rx : Ry is

A. 1 : 50
B. 3 : 20
C. 3:4
D. 4:3
E. 20:3

Question 9:

• WAEC 1996

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 10:

• WAEC 1996

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