Section 17: Motion, Forces And Conservation Of Energy

Question 1

What is a vector quantity

Answer 1

Something that has magnitude and direction

Question 2

What is magnitude

Answer 2

Size

Question 3

What is a scalar quantity

Answer 3

Something that only has magnitude

Question 4

What quantity is force

Answer 4

Vector

Question 5

What quantity is speed

Answer 5

Scalar

Question 6

What quantity is temperature

Answer 6

Scalar

Question 7

What quantity is time

Answer 7

Scalar

Question 8

What quantity is momentum

Answer 8

Vector

Question 9

What quantity is weight

Answer 9

Vector

Question 10

What quantity is energy

Answer 10

Scalar

Question 11

What quantity is velocity

Answer 11

Vector

Question 12

What quantity is acceleration

Answer 12

Vector

Question 13

What quantity is mass

Answer 13

Scalar

Question 14

What quantity is displacement

Answer 14

Vector

Question 15

What quantity is distance

Answer 15

Scalar

Question 16

What are examples of vector quantities

Answer 16

• force
• velocity
• displacement
• weight
• acceleration
• momentum

Question 17

What are examples of scalar quantities

Answer 17

• speed
• temp
• distance
• time
• mass
• energy

Question 18

Distance

Answer 18

How far an object has moved, it is a scalar quantity so it doesn’t involve direction

Question 19

Displacement

Answer 19

It is a vector quantity so it measures the distance and direction in a straight line from the objects starting point to the finishing point.
So if you walk 5m north then 5m south, the displacement is 0m but the distance is 10m

Question 20

Speed

Answer 20

How fast you’re going with no regard to the direction

Question 21

Velocity

Answer 21

The speed in a given direction

Question 22

Equation for distance travelled

Answer 22

Distance travelled = speed x time

Question 23

Speed of walking

Answer 23

1.4 m/s

Question 24

Average speed of running

Answer 24

3 m/s

Question 25

Average speed of Cycling

Answer 25

5.5 m/s

Question 26

What is acceleration

Answer 26

The change in velocity in a certain amount of time How quickly you’re speeding up

Question 27

How to work out average acceleration

Answer 27

a= (v-u)/t a= acceleration v = final velocity u= initial velocity t = time

Question 28

What is deceleration

Answer 28

The negative acceleration, if something slows down the change in velocity is negative

Question 29

How to work out constant acceleration

Answer 29

V^2 - u^2 = 2 X a X x A= acceleration x = distance

Question 30

Distance/time graphs

Answer 30

tells you how far something has travelled

Question 31

What do the different parts of the distance/time graphs show

Answer 31

- gradient (slope)= at any point, shows us the speed of an object - flat sections= where it’s stopped - the steeper the graph the faster the speed - curves = represent the acceleration, if the curve is steep it means it’s speeding up. - a levelling off curve means it’s slowing down

Question 32

How to work out the speed of an object from a distance/time graph

Answer 32

Change in the vertical/change in the horizontal

Question 33

What is a tangent

Answer 33

A line that is parallel to the curve at that point

Question 34

What do the different parts of a velocity/time graph show

Answer 34

Gradient = acceleration Flat section = steady speed Steep line = greater acceleration Uphill sections (/) acceleration Downhill (\) deceleration Curve = changing acceleration

Question 35

How to calculate the distance travelled on a time/velocity graph

Answer 35

The area under the graph

Question 36

Newton’s first law

Answer 36

If the resultant force on a stationary object is 0, the object will remain stationary.if. The resultant dove on a moving object is 0, it’ll just carry on moving at the same velocity

Question 37

Newton’s second law

Answer 37

F = m x a