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Additional Science GCSE physics > Weight,mass and forces > Flashcards

Weight,mass and forces Flashcards

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1
Q

What is gravitational force?

A

force of attraction between all masses

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2
Q

What does gravity do on the surface of a planet?

A

Makes all things accelerate towards the ground

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3
Q

What is the acceleration (due to gravity) on earth?

A

10 m/s

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4
Q

What gives objects weight?

A

gravity

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5
Q

How do you notice gravity?give one example

A

You only notice gravity when one of the masses is very big. Eg. a planet-anything near a planet is attracted strongly

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6
Q

What is mass?

A

‘amount of stuff’ in an object

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7
Q

Does the place change mass?

A

No

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8
Q

What is weight

A

Weight is caused by the pull of gravitational force

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9
Q

Does place change weight?

A

Yes

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10
Q

Will a 1kg mass will weigh less on the moon or earth?

A

The moon

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11
Q

What is the unit for weight and how is it measured?

A

Newtons and by a spring balance or newton meter

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12
Q

What is the unit for mass and how is it measured?

A

Kilograms with a mass balance

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13
Q

How do you calculate weight?

A

mass X gravitational field strength

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14
Q

What is a resultant force?

A

The overall force on a point or object

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15
Q

How many forces are acting on an object?

A

At least 2

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16
Q

Whats the resultant force of a stationary teapot?

A

zero

17
Q

What two forces are acting on an object

A

Gravity is acting downwards on the object and this causes a reaction force from the surface pushing up

18
Q

Why is it balanced?

A

The forces are equal

19
Q

Without a reaction force, what would happen?

A

It would accelerate downwards due to the pull of gravity

20
Q

If there is a resultant force,what will happen?

A

The object will change its state of rest or motion

21
Q

If the resultant force on a stationary object is zero what will happen?

A

Remain stationary

22
Q

If there is no resultant force on a moving object what happens?

A

Keep moving at the same velocity

23
Q

If the resultant force is not zero,what happens?

A

It will acellerate in the direction of the force

24
Q

What forms can acceleration take?

A

Starting, stopping, speeding up, slowing down, changing direction

25
Q

How do you work out the resultant force?

A

Mass X acceleration

Additional Science GCSE physics (4 decks)

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