FM1 - Mass, weight and gravity Flashcards

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1
Q

What is gravity?

A

The force of attraction between all masses

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2
Q

What three things does gravity affect?

A
  • It makes all objects accelerate towards the ground on the surface of the planet
  • It gives everything weight
  • It keeps planets, moons and satellites in their orbit
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3
Q

What is the orbit?

A

The balance between the forward motion of the object and the force of gravity pulling it inwards

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4
Q

What is mass?

A

The amount of “stuff” in an object

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5
Q

What is weight?

A

The pull of gravity on every object (towards the centre of the earth)

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6
Q

Will an object have the same mass and weight on the earth and moon?

A

It will have the same mass on the earth and moon but different weight

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7
Q

Why will 1.6N on the Moon weight less than it does on Earth which is 10N?

A

The forces of gravity pulling on the moon are less

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8
Q

What is weight measured in?

A

Newtons (N)

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9
Q

What is mass measured in?

A

Kilograms (kg)

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10
Q

What links weight, mass and gravity together?

A

The equation:

Weight = mass x gravitational field strength 
W = m x g
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11
Q

What is the value of ‘g’ on earth and the moon?

A

Earth - 10 N/kg

Moon - 1.6 N/kg

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