Exam_Focus_Physics_Test

A long-distance runner wishes to calculate her average speed for a race.

Which calculation should she use?

• A average speed =

  total time/

  total distance

• B average speed = total distance × total time

• C average speed =

  total distance/

  total time

• D average speed = total distance + total time

A heavy metal ball falls vertically downwards through air past four equally spaced levels J, K, L and M.

• A

• B

• C

• D

An arrow travels horizontally in a straight line at constant speed.

In which direction does the weight act?

• A

• B

• C

• D

Two rectangular blocks consist of different materials.

Four different methods are suggested to compare the two masses.

1 Compare the accelerations with which they fall freely.

2 Compare the values of their lengths × breadths × heights.

3 Hang each in turn from the same spring. Compare the extensions.

4 Place one in the right-hand pan of a beam balance and the other in the left-hand pan.

Which methods give a comparison of the two masses?

• A 1, 2 and 3

• B 1 and 2 only

• C 3 and 4 only

• D 4 only

The diagrams show four solid blocks with their dimensions and masses.

Which block has the greatest density?

• A

• B

• C

• D

A mass of 20 kg is held stationary by a rope passing over a frictionless pulley.

What is the tension T in the rope?

• A 10 kg

• B 20 kg

• C 100 N

• D 200 N

A spring is suspended from a stand. Loads are added and the extensions are measured.

Which graph shows the result of plotting extension against load?

• A

• B

• C

• D

A wooden bar is pivoted at its centre so that it can rotate freely. Two equal forces F are applied to the bar. In which diagram is the turning effect greatest?

• A

• B

• C

• D

A machine is very efficient.

What does this mean?

• A It produces a large amount of power.

• B It uses very little energy.

• C It wastes very little energy.

• D It works very quickly.

An object is lifted vertically by a motor. In which example is the power produced the greatest?

• A lifting it a shorter distance in a longer time

• B lifting it the same distance in a longer time

• C lifting it a shorter distance in the same time

• D lifting it the same distance in a shorter time