Physics Past Questions and Answers

An inelastic collision takes place between ball of known masses, just before the collision one of the ball is moving with a known velocity while the other is stationary. Which of the following physical quantities can be determined from the information given?

A Speed of each of the ball after collision
B Kinetic energy of each ball after collision
C Total momentum of the ball after collision
D Total momentum of the two ball after collision
E Mutual forces excerted by the balls

Question 727:

Using the force displacement diagram shown above. Calculate the work done

A 2000J
B 1000J
C 20J
D 5J

Question 728:

A machine of efficiency 8% is used to raise a body of mass 75kg through a vertical height of 3m in 30s. Calculate the power input. (g = 10ms^-2)

A 9.4W
B 60.0W
C 75.0W
D 93.8W

Question 729:

Two bodies P and Q, are in thermal equilibrium, which of the following statements about the bodies is correct?

A The temperature of Q is higher than that of P
B P and Q have the same heat capacty
C P and Q have the same mass
D P and Q are at the same temperature

Question 730:

The cubic expansivity of mercury is 1.8 x 10^-4K^-1 and the linear expansivity of glass 8.0 x 10^-6K^-1, calculate the apparent expansivity of mercury in a glass container

A 1.00 x 10^-4K^-1
B 1.56 x 10^-4K^-1
C 1.72 x 10^-4K^-1
D 2.04 x 10^-4K^-1