Multiple choice 2015.s.1

The circuit of a motor racing track is 3.0km in length. In a race, a car goes 25 times round the circuit in 30 minutes. What is the average speed of the car?

• A 75km/ hour

• B 90km/ hour

• C 150km/ hour

• D 750km/ hour

Two objects X and Y are suspended from identical springs. Both springs extend by the same amount. What does this show about the masses and about the weights of objects X and Y?

• A. mass X is greater than mass Y and weight X is greater than weight Y

• B. mass X is greater than mass Y and weight X is equal to weight Y

• C. mass X is equal to mass Y and weight X is equal to weight Y

• D. mass X is equal to mass Y and weight X is less than weight Y

A train travels along a horizontal track at constant speed. Two of the forces acting on the train are shown in the diagram. A force of air resistance is also acting on the train to give it a resultant force of zero. What is this air resistance force?

• A 40000N backwards

• B 80000N backwards

• C 40000N forwards

• D 80000N forwards

The diagram shows an object attached to a thread, swinging between point X and point Y, passing through point P. Which row best describes the kinetic energy and the gravitational energy of the object when it is passing through point P?

• A

• B

• C

• D

To keep a bottle of fruit juice cool on a hot day, it is wrapped in a cloth soaked in water. Why is this method successful?

• A Water has a high boiling point.

• B Water has a low melting point.

• C Water is a poor conductor of heat.

• D Water produces a cooling effect as it evaporates.

There is a vacuum between the double walls of a vacuum flask. Which types of heat transfer are reduced by the vacuum?

• A conduction, convection and radiation

• B conduction and convection only

• C conduction and radiation only

• D convection and radiation only

Which row gives an example of a longitudinal wave and describes the direction of the vibrations?

• A

• B

• C

• D

The diagram shows a ray of light travelling from P. Angle x is less than the critical angle. In which labelled direction does the ray continue?

• A

• B

• C

• D

Which type of wave cannot travel through a vacuum?

• A infra-red radiation

• B microwaves

• C sound waves

• D X-rays

The circuit shown contains three switches and four lamps P, Q, R and S. Which switches must be closed to light only lamps P and R?

• A switch 1 only

• B switch 1 and switch 2 only

• C switch 1 and switch 3 only

• D switch 2 and switch 3 only