Weight, Mass and Gravity Flashcards

1
Q

What is gravitation force?

A

The force of attraction between all masses.

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2
Q

Gravity attracts…

A

All masses.

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3
Q

Anything near a planet or star is what?

A

Attracted to it very strongly.

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4
Q

What happens on the surface of a planet?

A

It makes everything accelerate towards the ground.

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5
Q

On the surface of a planet it makes everything accelerate to the surface of the ground, with all the same what?

A

Acceleration.

10 m/s2 on earth.

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6
Q

On the surface of a planet it gives everything a…

A

Weight.

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7
Q

Weight and mass are not what?

A

The same.

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8
Q

What is mass?

A

The amount of ‘stuff’ in an object.

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9
Q

For any object this will have the same…

A

Value anywhere in the universe.

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10
Q

What is weight caused by?

A

Pull of gravitational force.

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11
Q

The weight of an object is what?

A

The force of gravity pulling it towards the centre of the earth.

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12
Q

Where does the object have the same mass?

A

Earth.

Moon.

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13
Q

What will be different on the earth and the moon?

A

Objects weight.

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14
Q

Why do objects weigh less on the moon that on earth?

A

Gravitational force pulling on it is less.

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15
Q

Weight is ____ measured in _____.

A

Force.

Newtons.

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16
Q

What is weight measured using in?

A

Spring balance.

Newton meter.

17
Q

Mass is not…

A

Force.

18
Q

What is mass measured in?

What with?

A

Kilograms.

Mass balance.

19
Q

What is a mass balance?

A

Old-fashioned pair of balancing scales.

20
Q

What is the equation for weight?

A

W = m x g.

Mass x gravitational field strength = weight.

21
Q

Acceleration due to gravity and gravitational field strength are what?

A

The same value, no matter what.

22
Q

G =

A

Strength of the gravity.

23
Q

G is different for…

A

Different planets.

24
Q

On Earth what is g?

A

10 N/kg.

25
Q

On the moon what is g?

A

About 1.6 N/kg.