P2.2 The Kinetic energy of Objects Speeding Up or Slowing Down Flashcards Preview

Physics > P2.2 The Kinetic energy of Objects Speeding Up or Slowing Down > Flashcards

Flashcards in P2.2 The Kinetic energy of Objects Speeding Up or Slowing Down Deck (12)
Loading flashcards...
1
Q

Define Elastic potential energy.

A

Stored in the object when work is done on the object to change its shape.

2
Q

Describe the relationship between force and extension in Hookes Law?

A

The extension of a spring or wire is directly proportional to the force acting on it.

3
Q

Define work done.

A

When a force causes an object to move through a distance work is done.

4
Q

Define gravitational potential energy.

A

Is energy that an object has due to its position in a gravitational field.

5
Q

What is regenerative braking?

A

A process where a car’s kinetic energy is transferred to electrical energy to slow the car down.

6
Q

What 2 factors make up the overall stopping distance of a car?

A

Thinking distance.
Plus.
Braking distance .

7
Q

State 3 factors that will increase the braking distance of a car.

A

Speed.
Worn brakes.
Worn tyres.
Poor condition of road.

8
Q

State 3 factors that will increase the thinking distance of a car.

A

Speed.
Tiredness.
Alcohol.
Drugs.

9
Q

State the conservation of momentum.

A

The momentum before the collision will be the same as the momentum after the collision.

10
Q

Explain how all of the following safety features act to reduce injury, air bag, crumple zones, seatbelt.

A

Increase the time taken for the object to stop thereby reducing the rate of change of momentum.

11
Q

Define power.

A

Energy transferred per second.

12
Q

What is one Watt equal to?

A

1 Joule per second.