⚡ Part 1: Forces & Motion — Multiple Choice

Circle the best answer for each question.

1. A force is best described as:

A type of energy stored inside an object

A push, pull or twist that can change an object's motion or shape

The weight of an object measured in kilograms

The speed at which an object travels

2. Which of the following is an example of a non-contact force?

Friction between a tyre and the road

A hand pushing a shopping trolley

Gravity pulling a ball toward the ground

Air resistance on a moving car

3. Forces are measured in units called:

Kilograms (kg)

Newtons (N)

Joules (J)

Metres per second (m/s)

4. When two forces acting on an object are equal in size but opposite in direction, we say the forces are:

Unbalanced

Net forces

Balanced

Frictional

5. A lever that has the effort between the fulcrum and the load is classified as a:

Class 1 lever

Class 2 lever

Class 3 lever

Class 4 lever

6. Which type of friction occurs when an object slides across a surface?

Rolling friction

Fluid friction

Sliding friction

Static friction

7. The mechanical advantage of a simple machine is calculated as:

Load Force ÷ Effort Force

Effort Force ÷ Load Force

Load Force × Effort Force

Effort Force + Load Force

✅ Part 2: True or False — Forces Concepts

Write True or False in the space provided.

8. Decide whether each statement is True or False:

a) A force can change the speed of an object. ___________

b) Electrostatic force requires objects to be touching. ___________

c) An inclined plane is a type of simple machine. ___________

d) Gears can be used to change the speed or direction of rotation. ___________

e) A wedge is simply two inclined planes joined together. ___________

f) When the net force on an object is zero, the object must be stationary. ___________

g) A pulley system can reduce the effort needed to lift a heavy load. ___________

✏️ Part 3: Short Answer & Calculations

Answer each question using full sentences where required.

9. Name and describe two types of non-contact forces. Give a real-world example of each.

10. A team of students is playing tug-of-war. Team A pulls with a force of 450 N to the right. Team B pulls with a force of 380 N to the left.

a) Calculate the net force and state its direction.
b) Will the rope accelerate, and if so, in which direction? Explain your reasoning.

11. Explain the difference between static friction and rolling friction. Why do vehicles use wheels instead of sliding along the ground?

12. Complete the table below by identifying the class of each lever and a real-world example:

Lever Description

Fulcrum is between the effort and the load

Load is between the fulcrum and the effort

Effort is between the fulcrum and the load

Class & Example

Class _____ Example: _____________________

13. A student uses a pulley system to lift a 600 N load. The system has a mechanical advantage of 3.

a) How much effort force does the student need to apply? Show your working.
b) What is one advantage and one disadvantage of using a pulley system?

14. Diagram Question: In the box below, draw and label a Class 2 lever. Include the fulcrum, load, effort, and the direction of each force using arrows.