Friction - Jamb Physics Past Questions and Answers

Question 21:

• JAMB 2008

A motorcycle of mass 100kg moves round in a circle of radius 10m with a velocity of 5 ms^-1. find the coefficient of friction between the road and the tyres.

A. 25.00
B. 2.50
C. 0.50
D. 0.25

Question 22:

• JAMB 2008

A short chain is sometimes attached to the back of a petrol tanker to?

A. Generate more friction
B. Ensure the balancing of the tanker
C. Caution the driver when overspeeding
D. Conduct excess charges to the car

Question 23:

• JAMB 2009

An object of mass 80 kg is pulled on a horizontal rough ground by a force of 500 N. Find the coefficient of static friction.
[g = 10 ms^-2]

A. 0.8
B. 0.4
C. 1.0
D. 0.6

Question 24:

• JAMB 2009

The terminal velocity of a ball-bearing falling through a viscous fluid reached when the

A. Upthrust is equal to the weight of the ball
B. Ball accelerate uniformly
C. Upthrustis equal to the velocity of the ball
D. Velocity is uniform

Question 25:

• JAMB 2010

The surfaces of conveyor belts are made rough so as to

A. Protect them while carrying loads
B. Prevent the loads from slipping
C. Enable them to carry more load
D. Make them stronger