Motion

Question 1

What is distance!?

Answer 1

It is how far an object moves. It is the numerical description for how far apart two things are

Question 2

Is distance vector or scalar!?and why!?

Answer 2

It is scalar as it does not include an associated direction

Question 3

What is speed!?

Answer 3

Speed is the distance travelled in a know period. It is the rate of change of distance

Question 4

What is rate of change!?

Answer 4

The amount of change in size of a quantity each second

Question 5

What is the typical speed of walking!?

Answer 5

1.5m/s

Question 6

What is the typical speed for running!?

Answer 6

3m/s

Question 7

What is the typical speed for cycling!?

Answer 7

6m/s

Question 8

What is the typical speed for a car!?

Answer 8

13-30m/s

Question 9

What is the typical speed of a train!?

Answer 9

50m/s

Question 10

What is the typical speed for a aeroplane!?

Answer 10

250m/s

Question 11

Is speed scalar or vector!?

Answer 11

Scalar

Question 12

How do you calculate speed!?

Answer 12

Speed= distance/ time taken

Question 13

What is velocity!?

Answer 13

The speed of an object in a given direction

Question 14

How do you calculate velocity!?

Answer 14

Velocity= displacement/ time

Question 15

Is velocity scalar or vector!?

Answer 15

Vector: uses a magnitude and always uses a direction

Question 16

What type of graph is distance travelled represented by!?

Answer 16

A distance- time graph

Question 17

What does a horizontal line on a distance-time graph show!?

Answer 17

The object is stationary

Question 18

How is speed calculated on a D-T graph!?

Answer 18

It is calculated from the gradient of the D-T graph

Question 19

What is a gradient!.

Answer 19

Another word for steepness. On a graph, the gradient is defined as being the change in the ‘y’ value divided by the change in the ‘x’ value. It defines how steep a line is.

Question 20

What is acceleration!?

Answer 20

Acceleration is the rate of change of velocity. It is the amount that velocity changes per unit time

Question 21

How is acceleration measured!?

Answer 21

Acceleration = change of velocity ÷ time taken.

Question 22

What is uniform acceleration!?

Answer 22

When a moving object’s speed changes the same amount per second

Question 23

What is the acceleration of any free falling object near earth’s surface!?

Answer 23

9.8m/s squared

Question 24

What is constant velocity also known as!?

Answer 24

Terminal velocity

Question 25

What is the equation for uniform acceleration!?

Answer 25

Final velocity (squared) - initial velocity (squared) = 2 x acceleration x distance

Question 26

What is the typical acceleration for running!?

Answer 26

2m/s squared

Question 27

What is the typical acceleration for a family car!?

Answer 27

1-7m/s

Question 28

What is the typical acceleration for a motorbike!?

Answer 28

1-10m/s squared

Question 29

What is the typical acceleration for a rollercoaster!?

Answer 29

30-60m/s squared

Question 30

What type of graph is the velocity of a moving object written on!?

Answer 30

A velocity-time graph

Question 31

What does the horizontal line of a V-T graph show!?

Answer 31

It shows that the object is at a constant velocity

Question 32

What does a sloping line on a V-T graph show!?

Answer 32

Shows that the object is accelerating

Question 33

What is the gradient equal to on a V-T graph!?

Answer 33

Acceleration

Question 34

How can you Calculate the distance travelled on a V-T graph!?

Answer 34

The distance travelled by an object can be calculated from the area under a velocity-time graph.

Question 35

The area under the graph can be calculated by:

Answer 35

using geometry (if the lines are straight)
counting the squares beneath the line (particularly if the lines are curved).

Question 36

What happens to an object moving at a constant speed in a circle!?

Answer 36

It’s direction constantly changes. This is causes a change in velocity because it’s a vector
A change in velocity results in acceleration, so an object moving in a circle is accelerating even though its speed may be constant.

Question 37

An object will only move if……

Answer 37

A resultant force acts on it

Question 38

What is a resultant force!

Answer 38

The single force that could replace all the forces acting on an object, found by adding these together. If all the forces are balanced, the resultant force is zero.

Question 39

Gravitational attraction provides what for the earth!?

Answer 39

the centripetal force needed to keep a planet in orbit around the Sun, and a satellite in orbit around a planet.

Question 40

Question: gravitational attraction between the Earth and the Moon keeps the Moon in orbit around the Earth. An object moving in a circular orbit at a constant speed has a changing velocity. Why!?

Answer 40

This is because velocity is a vector quantity that depends on speed and direction. The object in orbit is accelerating, even though its speed remains constant, because its velocity is changing.

Question 41

What is air resistance!?

Answer 41

A force of friction produced when an object moves through the air.

Question 42

What is thrust!?

Answer 42

A force used to move a body forwards or up

Question 43

What is terminal velocity!?

Answer 43

The maximum speed of an object, reached when the forces moving the object are balanced by its frictional forces.