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P2: Forces > P2.1: Motion > Flashcards

P2.1: Motion Flashcards

1
Q

What is a scalar?

A

A scalar is a quantity which has size/magnitude only

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2
Q

What is a vector?

A

A vector is a quantity which has size and direction

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3
Q

Vector quantity may be represented by

A

Arrow

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4
Q

Name scalar quantities

A

Mass, speed, time, power, volume, energy and distance

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5
Q

Name vector quantities

A

Displacement, velocity, force, pressure, weight

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6
Q

How is velocity different to speed?

A

Speed but with a direction

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7
Q

Steeper the gradient

A

Faster the speed

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8
Q

Negative gradient indicates

A

The object is returning back to the start point

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9
Q

A horizontal line indicates

A

The object is stationary

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10
Q

If the gradient is not a straight line it indicates

A

It show the velocity is changing and the object is accelerating or decelerating

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11
Q

SDT Formula

A

Speed = Distance / Time

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12
Q

Speed is measured in

A

metres per second (m/s)

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13
Q

Distance is measured in

A

metres (m)

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14
Q

A velocity-time graph tells us

A

The velocity of an object over time

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14
Q

Time is measured in

A

seconds (s)

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14
Q

Calculating acceleration

A

Acceleration = change in velocity / time

14
Q

Acceleration

A

metres per second squared (m/s^2)

14
Q

A distance-time tells us

A

The distance an object moves over time

14
Q

Change in velocity

A

metres per second (m/s)

14
Q

During circular motion the speed remains

A

constant

14
Q

Centripetal force

A

The force is always acting towards the centre of the circle

14
Q

Displacement

A

metres (m)

14
Q

However the velocity is changing

A

as the direction is changing

14
Q

Changing velocity means

A

there must be acceleration

14
Q

Initial velocity

A

metres per second (m/s)

14
Q

If there is acceleration

A

there must be a force

14
Q

SUVAT

A

S - displacement
U - initial velocity
V - final velocity
A - acceleration
T - time

14
Q

Final velocity

A

metres per second (m/s)

14
Q

SUVAT Equation

A

s = ut + 1/2at^2

14
Q

What is acceleration?

A

The rate of change of velocity

P2: Forces (2 decks)

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