Physics Past Questions and Answers

When taking a penalty kick, a footballer applies a force of 30.0N for a period of 0.05s. if the mass of the ball is 0.075kg, calculate the speed with which the ball moves off.

A 4.50ms^-1
B 11.25ms^-1
C 20.00ms^-1
D 45.00ms^-1

Question 7:

A particle starts from rest and moves with a constant acceleration of 0.5ms^-2. The distance covered by the particle in 10s is

A 2.5m
B 5.0m
C 25.0m
D 50.0m

Question 8:

A 20-toothed gear wheel drives a 60-toothed one. If the angular speed of the smaller wheel is 120 rev s^-1, the angular speed of the larger wheel is

A 3 rev s^-1
B 40 rev s^-1
C 360 rev s^-1
D 2400 rev s^-1

Question 9:

How long will it take a 60kg man to climb a height of 22m if he expended energy at a rate of 0.25kW. [g = ms^-2]

A 5.3s
B 34.5s
C 41.6s
D 52.8s

Question 10:

A force, 10N, drags a mass 10kg on a horizontal table with an acceleration of 0.2ms^{[/sup]. If the acceleration due to gravity is 10ms[sup]-1}, the coefficient of friction between the moving mass and the table is

A 0.02
B 0.08
C 0.20
D 0.80