The diagram shows four identical spheres placed between two wooden blocks on a ruler.

What is the diameter of one sphere?

A student wishes to determine the density of an irregularly-shaped stone. First he finds the mass of the stone. Next, he lowers the stone into a measuring cylinder containing water. The diagrams show the measuring cylinder before and after the stone is lowered into it.

How should the student calculate the density of the stone?

The diagrams show the dimensions and masses of four regular solid objects. The objects are made from different metals.

Which metal has the greatest density?

A car travels 100 km. The journey takes two hours. The highest speed of the car is 80 km/h, and the lowest speed is 40 km/h.

What is the average speed for the journey?

The mass of an object is measured on Earth. The mass is 5.0 kg. The object is taken to the Moon. The mass of the object is measured on the Moon. Give that the acceleration due to the gravity on the Moon is 6 times lower than on Earth.

What is the mass of the object on the Moon?

What is the weight of an object?

An object moves at a constant speed for some time, then begins to accelerate.

Which distance-time graph shows this motion?

A tennis player hits a ball hard and 0.40 s later hears the echo from a wall.

The speed of sound in air is 330 m/s. How far away is the player from the wall?

The graph shows how the speed of a car changes with time.

Which calculation gives the distance travelled by the car in 24 seconds?

An object of mass 500 kg accelerates from a velocity of 2.0 m/s to a velocity of 10 m/s in the same direction.

What is the impulse provided to cause this acceleration?

Which quantity is measured in newton seconds (Ns)?

The diagram shows an object of weight W and an object of weight Z balanced on a uniform meter rule.

Which equation relating to W, X, a, and b is correct?

The diagram shows a uniform beam being used as a balance. The beam is pivoted at its centre.

A 1.0 N weight is attached to one end of the beam. An empty pan weighing 0.2 N is attached to the other end of the beam.

How many 0.1 N weights must be placed on the pan in order to balance the beam?

An experiment is carried out to measure the extension of a rubber band for different loads. The results are shown in table. What figure is missing from the table?

The extension-load graph for a spring is shown. The unstretched length of the spring is 17.0 cm.

When an object is hung from the spring, the length of the spring is 19.2 cm. What is the weight of the object?

A skier walks from the bottom of a ski slope to the top and gains 10 000 J of g.p.e.

She skis down the slope. At the bottom of the slope, her kinetic energy is 2000 J.

How many energy is dissipated in overcoming friction and air resistance as the skier moves down the slope?

A coal-fired power station generates electricity. Coal is burnt and the energy released is used to boil water. The steam from the water makes the generator move and this produces electricity.

Which words are used to describe the energy stored in the coal and the energy of the moving generator?

Which energy source is one that is used to boil water to make steam in power stations?

A lorry of mass 4000 kg is travelling at a speed of 4.0 m/s.

A car has a mass of 1000 kg. The kinetic energy of the car is equal to the kinetic energy of the lorry.

What is the speed of the car?