Physics Past Questions and Answers

Two cars moving in the same direction have speeds of 100 kmh^-1 and 130 kmh^-1 what is the velocity of the faster car as measured by an observer in the slower car?

A 30 kmh^-1
B 130 kmh^-1
C 200 kmh[sup][/sup]
D 230 kmh^-1

Question 37:

A stone and a feather are dropped from the same height above the earth surface. ignoring air resistance, which of the following is correct?

A The feather will be brown away by the wind while stone will drop steadily
B The stone and the feather will both reach the ground a the same time
C The feather will reach the ground first
D The stone will reach the ground first

Question 38:

A car moves with an initial velocity of 25 ms^-1 and reaches a velocity of 45 ms^-1 in 10s. what is the acceleration of the car?

A 2 ms^-2
B 5 ms^-2
C 20 ms^-2
D 25 ms^-2

Question 39:

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

Question 40:

A machine of velocity ratio 6 requires an effort of 400 N to raise a load of 800 N through I m. Find the efficiency of the machine

A 55. 6 %
B 50.0%
C 33.3%
D 22.2%