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science-revision-newtons laws Flashcards

0
Q

What is the net force of 0 mean?

A

Means it is a balanced force (equal force in both directions
eg. 100net from the left and 100net from the right

Means the object will stay still

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1
Q

What is newtons first law?

A

Law of inertia
- an object at rest tends to stay at rest and an object in motion tends to stay in motion unless act upon by an unbalanced forced

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2
Q

What would happen if their was a car with a 100net force coming from the left direction and 60net force coming from the right direction? Which force is bigger/smaller?

A

This would equal a 40net force in the right direction.

The right force is bigger than the left force

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3
Q

What are some examples of potential forces that can slow it down?

A
  • air resistance

- gravity

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4
Q

What is MASS?

A

The measure of the amount of matter in an object

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5
Q

What is mass measured in?

A

Kg

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6
Q

What is inertia?

A

Inertia is the property of an object that describes now much it will resist change to the motion of the object

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7
Q

If something is sitting still its ___________

If something is moving its a combination of _________ and ___________

A

Mass

Mass and philosophy

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8
Q

More mass means more ________

A

Inertia

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9
Q

If something is moving it has__________

A

Momentum

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10
Q

What is the momentum formula?

A

Momentum = mass x velocity

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11
Q

What is this unbalanced force that acts on an object in motion?

A

FRICTION!!!

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12
Q

What are the four main types of friction??

A

Siding friction- ice skating
Rolling friction- bowling
Fluid friction- (air or liquid) air or water
Static friction- initial friction when moving an object

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13
Q

What does friction cause?

A

Heat

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14
Q

What is Newtons second law?

A

Force equals mass times acceleration

F = ma

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15
Q

If you have a constant velocity then the net force is ______ this means their is ____________

A

0

No friction

16
Q

What is force measured in ??.

A

Newtons

17
Q

Fact true or false

Newton is the force when you have 1kg and acceleration of 1newton/sec

A

True

18
Q

What is weight?

A

A measurement of the force of gravity on the mass of an object

19
Q

Formula for weight(force) is?

A

Weight(force) =mass x gravity (earth)

20
Q

If your mass is 45kg on earth what is your mass on the moon?

A

45kg as your mass (what you are made up of) does not change

21
Q

What is newtons third law?

A

For every action there is an equal and opposite reaction

Previous Study Cards (6 decks)

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