Physics Past Questions and Answers

Palm oil from a bottle flows out more easily after it as been heated because the

A Molecules are given potential energy during the heating
B Friction between oil layers is reduced
C Oil molecules force each other out
D Adhesion between the oil molecules and those of the bottle is increased

Question 2847:

A body weighing 10N moves with a speed of 5ms^-1 in a horizontal circular path of radius 5m. Calculate the . magnitude of the centripetal force acting on the body. (g = 10ms^-2)

A 10N
B 50N
C 75N
D 100N

Question 2848:

A motorcyclist, passing a road junction, moves due west for 8 s at a uniform speed of 5ms^-1. He then moves due north for another 6 s with the same speed. At the end of the 6s his displacement from the road junction is 50m in the direction of

A N53^oE
B N37^oE
C N53^oW
D N37^oW

Question 2849:

The time rate of change of displacement is known as

A Speed
B Velocity
C Impulse
D Acceleration

Question 2850:

A stone of mass 0.7kg is projected vertically , upwards with a speed of 5ms^-1. Calculate the maximum height reached. (Take g as 10ms^-2 and neglect air resistance)

A 1.00m
B 1.25m
C 1.50m
D 3.75m