Force, Work, and Energy

Force, Work & Energy Worksheet-10

True or False

1. Ice causes less friction.

2. Carpet produces more friction.

3. We can say work is done only if a force exerted on an object moves it in the direction of the force.

4. We can say work is not done if a force exerted on an object does not moves it in the direction of the force.

5. We cannot move everything with our bare hands.

6. When work is difficult to do with our hands, we use tools called machines.

7. Smoother materials produce more  friction.

8. Rougher materials cause less friction.

Force, Work & Energy Worksheet-11

True or False

1. We use simple machines in our everyday life.

2. Machines make our work easy.

3. A lever is a simple machine.

4. We can move anything with our bare hands.

5. When work is difficult to do with our hands, we use tools called force.

6. Lever is used to lift or move heavy weights.

7. Pulley is used to cut things.

8. Wedge is used to open the lid of a tin.

9. Lever is used to cut things.

Force, Work & Energy Worksheet-12

True or False

1. The spoon acts as a lever when we use a spoon handle to open the lid of a tin.

2. A pulley is a complex machine.

3. A lever has a grooved wheel and a rope running between the grooves of the wheel.

4. Almost all vehicles have lever.

5. Almost all vehicles have wheels.

6. A rod which is connected to wheels is called a screw.

7. The axle moves the screw.

8. Moving heavy objects become easy with the help of a screw.