OCR GCSE Combined Science A (Gateway) Physics Paper 5 Foundation November 2021 question paper J250/05

This question is about forces.

Which diagram shows attraction?

Each planet, A – D, has the same diameter (width).

Which planet has the largest gravitational field strength?

Which statement describes power?

A The rate of flow of charge.

B The rate of flow of current.

C The rate of stretching of a spring.

D The rate of transfer of energy.

Both lamps in this circuit are identical.

The current at point X is 0.2 A.

What is the current at point Y ?

A 0.1 A

B 0.2 A

C 0.4 A

D 0.6 A

In an electrical circuit, a current of 1.2 A flows for 25 seconds.

How much charge is transferred?

A 0.048 C

B 20.8 C

C 30 C

D 1800 C

A battery in a circuit has a potential difference of 6 V.

How much energy is transferred when 4 C of charge flows?

A 0.4 J

B 0.67 J

C 1.5 J

D 24 J

A student uses friction to charge a piece of plastic.

Which statement explains why the plastic becomes negatively charged?

A The plastic gains electrons.

B The plastic gains protons.

C The plastic loses electrons.

D The plastic loses protons.

A teacher is distilling water using the equipment shown in the diagram.

Distillation involves evaporating and condensing the water.

When the teacher starts, there is 100 g of water in the flask, and the beaker is empty.

They stop when less than half of the water in the flask has been distilled.

Which statement is correct?

A Mass of water in flask + Mass of water in beaker = 100 g

B Mass of water in flask – Mass of water in beaker = 100 g

C Mass of water in flask = Mass of water in beaker

D There is twice as much water in the beaker than in the flask

A magnetic field is produced around a current-carrying wire.

A student views the magnetic field from above, as shown by the eye in the diagram.

Which diagram shows the magnetic field around the wire?

Student A says:

‘The displacement from Room 1 to Room 4 is the same as the distance travelled from Room 1 to Room 4.’

Use calculations to explain why student A is incorrect.

Draw two lines from each word to the correct descriptions.

Student B runs along the corridor from Room 1 to Room 2.

Fig. 11.2 is a graph of their motion:

Calculate the acceleration of student B during the first 2 seconds.

Use the equation: acceleration = change in velocity / time

Acceleration =........ m / s²

Describe the motion of the student between 2 and 10 seconds.

Student C starts running along the corridor from Room 1 to Room 2 at the same time as student B.

Their acceleration is less than student B ’s acceleration.

Add a line to Fig. 11.2 to show the acceleration of student C.

Fig. 12.1 shows a picture of a ball on a field. The ball is not moving.

Fig. 12.2 shows part of a free-body force diagram for the ball.

The force is drawn to scale. 1 cm = 1 N.

Complete the free-body force diagram by adding in the missing force.

Which word describes this missing force?

Contact Electrostatic Gravity Magnetic

A person kicks the ball.

Complete the sentences explaining what happens to the ball.

Choose words from the list.

You may use each word once, more than once or not at all.

balanced

forces

gravity

masses

speed

unbalanced

The........ on the ball are........

Therefore the........ of the ball changes.

The mass of the ball is 0.4 kg.

How much force is needed to accelerate the ball at 400 m / s²?

Use the equation: force = mass × acceleration

Fig. 12.3 shows the person placing the ball so it touches a wall.

He now kicks the ball directly at the wall.

The ball changes shape. Explain why.

A teacher lifts a weight of 45 N through a height of 1.8 m.

Calculate the work done by the teacher.

Use the equation: work done = force × distance

Another teacher does 1500 J of work.

They take 5 seconds to do the work.

Calculate their power.

Give the unit in your answer.

Use the equation: power = work done / time

A student carries out an experiment to calculate the spring constant of a spring.

Here are the student’s results.

Calculate the force when the mass is 200 g.

Use the equation: gravitational force = mass × gravitational field strength

Assume gravitational field strength = 10 N / kg.

Calculate the spring constant when the mass is 500 g.

Use the equation: force exerted by a spring = extension × spring constant

Give your answer to the nearest whole number.

Spring constant =........ N / m

Calculate the mean value of the spring constant.

Use the values in the table from 100 g to 400 g only.

Mean spring constant =........ N / m

The teacher says that calculating the mean is a poor method to find the spring constant, even though the student’s calculations are correct.

Describe a better way to find the spring constant using the student’s measurements.

15* (a) A student investigates if resistance changes as current changes.

The student can use this equipment:

Describe the method the student should follow to work out if the resistance of the 10 cm wire changes as current changes and describe how to use the results to calculate resistance.

You can include a diagram in your answer.

The student writes a risk assessment for the investigation.

Suggest a possible hazard for this investigation.

How can the student reduce the risk from the hazard?

Place the events in the order they occurred.

Write the numbers in the boxes below. One has been done for you.

The events were peer reviewed and communicated to others.

Suggest why both are important in science.

Table 16.1 gives the density of different materials.

Describe any trends in the data in Table 16.1.

Explain the difference in density between solids and liquids.

You may draw diagrams to help your answer.

Table 16.2 gives some information about ethanol and water.

The specific latent heat of vaporisation is the energy transferred when 1 kg of a substance changes from liquid to gas.

Calculate the amount of energy needed to evaporate 0.2 kg of ethanol.

Use Table 16.2 and an equation from the Data Sheet to help you.

The energy needed to heat 1 kg of water by 1 °C is 4200 J.

The energy needed to evaporate 1 kg of water is 2 256 000 J.

This is much more than 4200 J. Explain why.