Cambridge O Level Physics Quiz

A student wishes to measure directly the circumference of a football. What is the most suitable instrument to use?

• a clock only

• a measuring tape only

• a micrometer only

• a ruler only

Which equation contains two vector quantities?

• acceleration = change in velocity / time taken

• average speed = distance travelled / time taken

• density = mass / volume

• volume = length × width × height

Forces of 6.0 N and 8.0 N act as shown.

Which diagram shows the resultant R of these two forces?

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A speed–time graph for the journey of a car is shown.

What is the distance–time graph for the journey?

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The gravitational field strength on Earth is 9.8 N / kg. The gravitational field strength on Mars is 3.7 N / kg. The difference between the weight of an object on Earth and the weight of the same object on Mars is 25 N. What is the mass of the object?

• 1.9 kg

• 2.6 kg

• 4.1 kg

• 6.8 kg

A student determines the density of a solid metal cube. Which pieces of equipment does the student use?

• a balance and a force meter

• a balance and a ruler

• a micrometer and a measuring cylinder

• a ruler and a measuring cylinder

The diagram shows the only two horizontal forces acting on a trolley that is accelerating at 0.12 m / s².

What is the mass of the trolley?

• 0.050 kg

• 0.13 kg

• 20 kg

• 80 kg

A spring is stretched to different lengths by a variable force.

What is the spring constant k of the spring?

• 0.27 N / cm

• 0.40 N / cm

• 2.5 N / cm

• 3.8 N / cm

A uniform horizontal beam, pivoted at its right-hand end, is in equilibrium. A force of 60 N acts vertically upwards on the beam as shown.

What is the weight of the beam?

• 36 N

• 40 N

• 90 N

• 100 N

A constant frictional force acts on a moving object for a short amount of time causing the momentum of the object to decrease. Which expression is used to calculate the time for which the force acts?

• time = change in momentum / force

• time = change in momentum × force

• time = momentum / force

• time = momentum × force