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# The kinetic energy of a car travelling along a level road depends on - PowerPoint PPT Presentation

The kinetic energy of a car travelling along a level road depends on. the distance the car travels the frictional forces acting on the car the mass of the car only the speed of the car only the mass and speed of the car. Which row of values would result in the greatest kinetic energy?.

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Presentation Transcript

• the distance the car travels

• the frictional forces acting on the car

• the mass of the car only

• the speed of the car only

• the mass and speed of the car

A 20 N weight is hung on a spring balance. The spring extends by 0.10 m. The weight is removed and a bag of potatoes is hung on the balance. The spring extends by 0.15 m.What is the weight of the bag of potatoes?

• 10 newtons

• 15 newtons

• 20 newtons

• 30 newtons

• 50 newtons

A car designer wants to increase the maximum acceleration of a car.Which entry shows what should be done to the engine force and the mass of the car?

• distance

• force

• gravitational potential energy

• kinetic energy

• power

8N power?

8N

4N

4N

4N

8N

4N

8N

4N

8N

8N

4N

8N

4N

The diagrams below show the forces acting on a number of moving objects. Which object is moving at constant speed?

1.

2.

3.

4.

5.

• the distance the car travels

• the frictional forces acting on the car

• the mass of the car only

• the speed of the car only

• the mass and speed of the car