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Physics > Section 1 Forces And Motion > Flashcards

Section 1 Forces And Motion Flashcards

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1
Q

Formula for density

A

Mass/volume

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2
Q

Units for mass and weight

A

Kg and N

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3
Q

What is the gradient of a distance time graph

A

Straight horizontal line

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4
Q

Acceleration equation

A

Change in velocity/change in time

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5
Q

Gravitational field strength equation

A

Weight/mass

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6
Q

How to calculate resultant vectors

A

Pythagoras or sohcahtoa

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7
Q

How to calculate resultant force

A

Mass x acceleration

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8
Q

What is the resultant force on an object moving at constant speed

A

0N

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9
Q

What is solid friction

A

The force between 2 objects that are moving or trying to move past each other that impedes motion and produces heatint

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10
Q

In which direction does drag act compared to the motion of an object

A

In the opposite direction to the motion

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11
Q

What can you say about the forces on a falling object at its terminal velocity

A

Air resistance is equal to the weight because of gravity

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12
Q

Spring constant equation

A

Spring constant = force/extension

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13
Q

Equation for moment

A

Moment = force x perpendicular distance from the pivot

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14
Q

Equation for momentum

A

Momentum = mass x velocity

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15
Q

How to calculate momentum before

A

Mass x velocity + mass x velocity choose one direction as positivr

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16
Q

Momentum after equation

A

Momentum before/added mass

17
Q

Impulse meaning

A

The size of a force x the length of time it acts for. It equals the change of momentum of the object

18
Q

Units for impulse

A

Ns

19
Q

Impulse equation

A

Force x time

20
Q

How to calculate change in momentum

A

Force = change in momentum/change in time

21
Q

State the principle of moments

A

If an object is balanced the total anticlockwise moments equal the total clockwise moments

22
Q

What effect does drag have on motion

A

Resists motion

Physics (8 decks)

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