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Physics, A Level Ocr Spec a > Forces In Action > Flashcards

Flashcards in Forces In Action Deck (10)
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1
Q

Define centre of mass

A

The centre of mass is the point in which a force acting through it would cause acceleration but no rotation

2
Q

Define centre of gravity

A

The point from which the weight of the object acts from

3
Q

Define the principle of moments

A

For a body in rotational equilibrium anti-clockwise moments round a point equal clockwise moment about the same point.

4
Q

A couple definition

A

Two force that are parallel but all no along different lines of action.

5
Q

What is torque?

A

Fd

6
Q

Density symbol

A

ρ (tho)

7
Q

Density=

A

Mass/unit volume

8
Q

Pressure define?

A

Force exerted over unit area

9
Q

Pressure exerted by a colour of fluid

A

ρgh

10
Q

Archimedes principle

A

The up thrust exerted on a body immersed in a cloud is equal to the weight of fluid distances