Motion

Question 1

What is displacement ?

Answer 1

The distance travelled in a specific direction

Question 2

What is velocity ?

Answer 2

The speed of an object in a specific direction

Question 3

What is the equation that links average speed, distance and time?

Answer 3

S=d/t

Question 4

What is the purpose and benefit of taking multiple readings ?

Answer 4

Calculate a mean, reduce ransom errors

Question 5

How do you find the total distance travelled ?

Answer 5

Read off Y-axis

Question 6

What does a constant speed look like on a d-t graph?

Answer 6

A straight line

Question 7

What does a curved line on a d-t graph describe about the motion of an object ?

Answer 7

That the object is accelerating

Question 8

What is the equation that links acceleration, final velocity, initial velocity and time?

Answer 8

v=u+at
a= (v-u)/t

Question 9

What equation links displacement, final velocity, initial velocity and time ?

Answer 9

S=1/2(u+v)t

Question 10

What does area under the graph shows?

Answer 10

Displacement

Question 11

What feature of a v-t graph shows constant acceleration?

Answer 11

Shown by a straight line

Question 12

How do you find acceleration from a v-t graph ?

Answer 12

Calculating the gradient

Question 13

Acceleration=?

Answer 13

Acceleration= change in Y/ change in X

Question 14

How do you find distance travelled on a d-t and v-t graphs ?

Answer 14

d-t read of Y-axis
v-t area under graph

Question 15

How do you find speed on a d-t and v-t graphs ?

Answer 15

d-t gradient of line
v-t read of the Y-axis

Question 16

How do you find acceleration on a d-t and v-t graphs ?

Answer 16

d-t look at the curve
steeper= acceleration
shallower= deceleration

v-t gradient of line

Question 17

What is acceleration?

Answer 17

The rate of change of velocity

Question 18

What are the unit for acceleration.

Answer 18

m/s2

Question 19

What does m/s2 mean in words ?

Answer 19

1m/s2 means an increase in the velocity of an object by 1m/s each second

Question 20

Equation for acceleration?

Answer 20

Acceleration= change in velocity/time taken

a=(v-u)t

Question 21

What does it mean if an object has a negative acceleration?

Answer 21

It means it is decelerating

Question 22

What is happening to the velocity of an object if it’s decelerating?

Answer 22

This means it’s slowing down, its velocity is decreasing

Question 23

Units for deceleration ?

Answer 23

m/s2 (same for acceleration)

Question 24

How do you calculate stopping distance?

Answer 24

Stopping distance =thinking distance+ braking distance

Question 25

What is thinking distance?

Answer 25

Travelled distance whilst reacting to obstacle

Question 26

What factors will increase/ decrease thinking distance?

Answer 26

Increase- tiredness, alcohol, distractions
Decrease- caffeine

Question 27

What is braking distance?

Answer 27

Travelled distance whilst applying the brakes

Question 28

What factors will increase the braking distance?

Answer 28

Icy/wet road, old brakes, overloaded car

Question 29

What can force change about an object ?

Answer 29

Shape, speed, direction

Question 30

What equation that links gravitational field strength, mass and weight ?

Answer 30

Weight= mass x gfs

Question 31

What is gravitational field strength measured in?

Answer 31

N/kg

On earth, g=10N/kg

Question 32

How do you find speed from a distance time graph?

Answer 32

Gradient

Question 33

What is a scalar?

Answer 33

It has size (magnitude) only

Question 34

What is a vector ?

Answer 34

It has both magnitude and direction

Question 35

Example of scalar?

Answer 35

Mass
Energy
Distance
Speed
Temperature
Time

Question 36

Example of a vector?

Answer 36

Force
Velocity
Acceleration
Displacement