Year 7 Forces Worksheet - Beginner

Year 7 Forces worksheet for Year 7 (Key Stage 3 / Year 7-9 (Ages 11-14)). Beginner level science practice, aligned to the UK National Curriculum. Print-ready with answer key included.

Science•Key Stage 3 / Year 7-9 (Ages 11-14)•Forcesbeginner

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Forces in Action

Year 7 Science | Ages 11–12 | Beginner

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Instructions: Work through the activities in order. Read each question carefully, show working for calculations, and include units where needed. Use the guidance in the questions: for weight, take gravitational field strength as 10 N/kg; for springs, use the stated spring constant.

Forces: pushes, pulls and newtons

A force is a push or a pull, and forces are measured in newtons (N). For each situation, decide whether the named force is a push or a pull. Then answer the final question using the correct unit.

1. A hand presses a door to close it. Is the force a push or a pull?

2. A rope is used to drag a box across the floor. Is the force from the rope a push or a pull?

3. A magnet attracts a paper clip towards it. Is the magnetic force a push or a pull?

4. A force meter reads 6. Which unit should be written after the reading?

Balanced or unbalanced?

Forces are balanced when they cancel out, so the resultant force is zero. If forces are unbalanced, work out the resultant force and state its direction. Treat right as positive and left as negative where a calculation is needed.

1. A trolley has a 5 N force to the right and a 5 N force to the left. Are the forces balanced or unbalanced?

2. A box is pushed right with 9 N and pushed left with 4 N. Find the resultant force and its direction.

3. A toy car has a 7 N force to the left and a 2 N force to the right. Find the resultant force and its direction.

4. A book rests on a table. Its weight acts downwards and the table’s support force acts upwards with equal size. What is the resultant force on the book?

Friction and air resistance

Friction acts between surfaces in contact and usually opposes sliding. Air resistance is a force from air that opposes an object moving through it. Use these ideas to complete each response.

1. A cyclist squeezes the brakes. Which force between the brake pads and wheel helps slow the bicycle?

2. A parachutist falls through the air. Name the force from the air that opposes the fall.

3. A student rubs their hands together and they warm up. Which force between the hands causes this?

4. A streamlined car is designed to reduce which opposing force as it moves through the air?

Mass and weight

Mass is measured in kilograms (kg), while weight is a force measured in newtons (N). Calculate weight using W = mg. For every question here, use g = 10 N/kg and include the unit N in your answer.

1. A school bag has a mass of 2 kg. Calculate its weight.

2. A cat has a mass of 4 kg. Calculate its weight.

3. A 30 N weight acts on an object where g = 10 N/kg. Calculate the object’s mass.

4. Complete the statement: mass is measured in ___, and weight is measured in ___.

Stretching springs and Hooke’s law

A spring’s extension is its stretched length minus its original length. In the questions below, the spring follows Hooke’s law: force = spring constant × extension (F = kx). The spring constant is 2 N/cm, so use extension in centimetres and give force in newtons.

1. A spring is 10 cm long at first and 13 cm long when stretched. Calculate its extension.

2. A spring extends by 2 cm. Calculate the force needed to stretch it.

3. A force of 8 N stretches a spring with spring constant 2 N/cm. Calculate the extension.

4. A spring extends by 3 cm. Calculate the force using F = kx.

Answer Key

Activity 1: 1. Push ; 2. Pull ; 3. Pull ; 4. N (newtons)

Activity 2: 1. Balanced ; 2. 5 N to the right ; 3. 5 N to the left ; 4. 0 N

Activity 3: 1. Friction ; 2. Air resistance ; 3. Friction ; 4. Air resistance

Activity 4: 1. 20 N ; 2. 40 N ; 3. 3 kg ; 4. kilograms (kg) ; newtons (N)

Activity 5: 1. 3 cm ; 2. 4 N ; 3. 4 cm ; 4. 6 N