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Physics Exam > Revision > Flashcards

Revision Flashcards

1
Q

What is a force, what is it measured in?

A

A force is a push,. pull or a twist its measured in Newtons

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2
Q

What are 4 ways a force can affect an object

A

Accelerate, decelerate, change direction, change shape

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3
Q

Contact forces

A

Air resistance, buoyancy, tension

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4
Q

Non-contact forces

A

Gravity, weight, electrical, magnetic

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5
Q

If the applied force is greater than the air resistance what is the object doing?

A

Speeding up

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6
Q

If the air resistance is greater than the applied what is the object doing?

A

slowing down

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7
Q

If the air resistance and applied force is equal what is the object doing

A

Going at a constant speed

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8
Q

If there is no air resistance or applied force what is the object doing?

A

It is stationary

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9
Q

How do you convert km/h to m/s

A

divide by 3.6

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10
Q

What is mass and what is it measured in?

A

Mass is the amount of matter that makes up an object , it is measured in KG

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11
Q

What is weight and what is it measured in?

A

Weight is the gravitational force acting on an object it is measured in Newtons

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12
Q

What is gravity>

A

The rate of acceleration at which an object falls=9.8m/s2

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13
Q

What are the two factors that determine the strength of the gravitational pull?

A
  1. Mass of the planet

2. Distance you are from the centre of the Earth

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14
Q

What is instantaneous speed?

A

Speed of an object in a particular moment eg: speedometer in a car

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15
Q

What is inertia?

A

Resistance an object has to a change in its state of motion

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16
Q

Scalar

A

How far something travels (Magnitude)

17
Q

Vector

A

How far somethings travels and the direction

18
Q

What is displacement?

A

Measures the shortest distance to a location

19
Q

What is work measured in?

A

Joules

20
Q

Why don’t you fall through the floor?

A

Because the floor provides an upward push against the force of gravity. These two forces are balanced

21
Q

Newtons law of energy

A

Energy cannot be created nor destroyed only transformed

22
Q

Define Kinetic energy

A

The energy an object possesses due to its motion eg: rollercoaster

23
Q

Define Potential Energy

A

The energy stored in an object due to its position

24
Q

Define contact forces

A

A contact force is any force that requires contact to occur.

25
Q

initial speed=

A

final speed-(AxT)

26
Q

Define non-contact forces

A

A non-contact force is a force which acts on an object without coming physically in contact with it.

27
Q

A table tennis ball launcher is fired. Compared to the force on the ball, the force on the launcher is

A

the same

28
Q

what forces are acting on a ballon as its released

A

every action has an equal and opposite reaction. Therefore, as the gas is released from the balloon, it pushes against the outside air, and the outside air pushes back.

Physics Exam (2 decks)

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