Year 7 Forces Worksheet - Intermediate

Year 7 Forces worksheet for Year 7 (Key Stage 3 / Year 7-9 (Ages 11-14)). Intermediate 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)•Forcesintermediate

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Forces in Action

Year 7 Science • Ages 11–12 • Intermediate

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Instructions: Explore how forces affect objects, from pushes and pulls to stretching springs. Use the information given in each question, show your working for calculations, and include units where appropriate.

Forces: Pushes, Pulls and Units

For each situation, identify whether the force is a push or a pull. Then answer the question about how force is measured. Use scientific vocabulary and write your answers in the boxes.

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

2. A dog pulls on its lead. Is the force a push or a pull?

3. What is the name of the unit used to measure force?

4. What instrument is commonly used to measure a force in newtons?

Balanced or Unbalanced?

Compare the forces acting in each situation. Balanced forces are equal in size and opposite in direction; unbalanced forces have a non-zero overall force. State whether the forces are balanced or unbalanced, then find the resultant force where asked.

1. A book rests on a table. The table pushes up with 5 N and the book’s weight acts down with 5 N. Are the forces balanced or unbalanced?

2. A toy is pulled right with 9 N and pulled left with 4 N. Are the forces balanced or unbalanced?

3. For the toy in Question 2, calculate the resultant force and state its direction.

4. A trolley is pushed forwards with 12 N while friction acts backwards with 12 N. What is the resultant force?

Friction and Air Resistance

Use your understanding of forces that oppose motion. For each situation, name the relevant resistive force and explain its effect briefly. Give a practical example when asked.

1. A bicycle’s brakes press pads against its wheel rim. Name the force that helps slow the bicycle.

2. A parachutist falls through the air. Name the force from the air that acts against the motion.

3. A box slides across a rough floor and slows down. In which direction does friction act compared with the box’s motion?

4. Give one way a cyclist can reduce air resistance while riding.

Mass and Weight

Use the formula W = mg, where W is weight in newtons, m is mass in kilograms and g is gravitational field strength. For this activity, use g = 10 N/kg. Show your calculation and include the correct unit.

1. Calculate the weight of a 2 kg school bag on Earth.

2. A box has a mass of 5 kg. Calculate its weight using g = 10 N/kg.

3. An object weighs 70 N on Earth. Calculate its mass using g = 10 N/kg.

4. Which quantity, mass or weight, is measured in newtons?

Springs and Hooke’s Law

A spring follows Hooke’s law in the range shown: extension is proportional to the force applied. Read the results table, then answer the questions. Extension is measured from the spring’s original length.

Force (N)	Extension (cm)
0	0
2	1
4	2
6	3

1. What extension is produced by a force of 4 N?

2. What force produces an extension of 3 cm?

3. If the pattern continues within the spring’s proportional range, what extension would a force of 8 N produce?

4. State the relationship between force and extension shown by these results.

Answer Key

Activity 1: 1. Push ; 2. Pull ; 3. Newton (N) ; 4. Force meter (newton meter)

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

Activity 3: 1. Friction ; 2. Air resistance ; 3. Opposite to the direction of motion ; 4. Any suitable answer, such as crouching or wearing close-fitting clothing

Activity 4: 1. 2 × 10 = 20 N ; 2. 5 × 10 = 50 N ; 3. 70 ÷ 10 = 7 kg ; 4. Weight

Activity 5: 1. 2 cm ; 2. 6 N ; 3. 4 cm ; 4. Extension is directly proportional to force in the range shown (each 2 N increase produces 1 cm more extension)