Force, Work and Energy Quiz

Refer to the table showing different actions and effects. Which statement is true based on the table? (Action) (Change in Shape) (Change in Speed) (Change in Direction) Pressing clay ✅ ❌ ❌ Kicking a rolling ball ❌ ✅ ✅ Pulling a drawer ❌ ✅ ❌

1. All forces only change speed.
2. Forces can produce more than one effect at the same time.
3. Pulling never changes direction.
4. Shape changes only when the object is moving.

Answer: (b) Forces can produce more than one effect at the same time.

Two students are discussing a tool used to lift heavy loads easily: Zoya: It has a bar that turns around a fixed point. Alex: It reduces the effort needed to lift something. Which simple machine are they talking about?

1. Pulley
2. Wedge
3. Lever
4. Screw

Answer: (c) Lever

Mark each statement True (T) or False (F): 1. Friction converts kinetic energy into heat energy. 2. In icy conditions, friction increases, helping cars stop faster. 3. Lubricants are used to reduce friction in machines. 4. Friction is not useful in any practical life situation. Which combination is correct?

1. 1 – True, 2 – True, 3 – False, 4 – True
2. 1 – False, 2 – False, 3 – True, 4 – True
3. 1 – True, 2 – False, 3 – False, 4 – False
4. 1 – True, 2 – False, 3 – True, 4 – False

Answer: (d) 1 – True, 2 – False, 3 – True, 4 – False

Consider the following statements and choose the correct combination of true or false: 1. Work is done only when a force moves an object in the direction of the force. 2. Energy can be created when more work is done. 3. Mechanical energy is the sum of potential and kinetic energy.

1. 1 – True, 2 – False, 3 – True
2. 1 – False, 2 – True, 3 – True
3. 1 – True, 2 – True, 3 – False
4. 1 – True, 2 – False, 3 – False

Answer: (a) 1 – True, 2 – False, 3 – True

You are building a slide for a water park. What surface material should you avoid using to ensure people slide down quickly and safely?

1. Smooth polished plastic
2. Slippery fiberglass
3. Sticky rubber
4. Teflon-coated surface

Answer: (c) Sticky rubber

Which of the following is NOT a correct lever-example match?

1. Seesaw – First-class
2. Wheelbarrow – Second-class
3. Fishing rod – Third-class
4. Hammer removing a nail – Third-class

Answer: (d) Hammer removing a nail – Third-class

Alexa and her friends are setting up a science fair stage. They need to lift heavy curtains using pulleys. Which options will help reduce the effort needed to lift the curtain? 1. Fixed pulley at the top 2. Movable pulley 3. Single pulley with no mechanical advantage 4. Pulley system with multiple wheels 5. Pulley that only changes direction

1. 1 and 3
2. 2 and 4
3. 1 and 5
4. 3 and 5

Answer: (b) 2 and 4

Five energy sources and their applications are listed below. Which two options are wrongly matched? No. Energy Source Application 1 Thermal energy Cooking food in an oven 2 Sound energy Powering a radio 3 Chemical energy Burning fuel in a car engine 4 Light energy Solar-powered garden lights 5 Mechanical energy Moving wind turbines

1. 1 and 5
2. 2 and 5
3. 2 and 3
4. 3 and 5

Answer: (b) 2 and 5

Consider the following statements and choose the correct combination of true or false: 1. Work is done only when a force moves an object in the direction of the force. 2. Energy can be created when more work is done. 3. Mechanical energy is the sum of potential and kinetic energy.

1. 1 – True, 2 – False, 3 – True
2. 1 – True, 2 – True, 3 – False
3. 1 – False, 2 – False, 3 – True
4. 1 – False, 2 – True, 3 – False

Answer: (a) 1 – True, 2 – False, 3 – True

Which statement best explains the relationship between work and energy?

1. Energy is produced only when no work is done
2. Work is done only if energy is destroyed
3. Doing work uses energy and transfers it to another object
4. Work and energy are completely unrelated

Answer: (c) Doing work uses energy and transfers it to another object