P2.2 - The Kinetic energy of objects speeding up or slowing down Flashcards Preview

Physics GCSE - P2 > 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 (11)
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1
Q

When a force causes an object to move through distance…

A

…work is done

2
Q

What is the equation related to work done, force and distance?

A

W = f x d

3
Q

What happens to energy when work is done?

A

It is transferred

4
Q

Work is done against…

A

…frictional forces

5
Q

What is power?

A

The work done or energy transferred in a given time

6
Q

When an object is raised vertically, work is done against…

A

…gravitational force and the object gains gravitational potential energy

7
Q

What is gravitational potential energy?

A

The energy that an object has by virtue of its position in a gravitational field.

8
Q

What does the kinetic energy of an object depend on?

A

Its mass and speed.

9
Q

What is gravitational filed strength measured in?

A

N/kg

10
Q

What is the conservation of momentum?

A

When, in a closed system, the total momentum before an event is equal to the total momentum after the event.

11
Q

What is momentum measured in?

A

kg m/s