1.

Question 1

1. converting m/s to km/h

2. converting km/h to m/s

Answer 1

1. times by 3.6

2. divide by 3.6

Question 2

What is the equation for acceleration?

Answer 2

Acceleration = (Final Velocity - Initial Velocity) / Time

OR

Acceleration = Change in Velocity / Time

Question 3

Give some examples of scalar quantities.

Answer 3

Time, Speed, Distance, Mass

Question 4

Define displacement

Answer 4

• displacement is the direction and distance an object moves in a straight line
• vector quantity

Question 5

Define speed

Answer 5

• Scaler quantity

* Just how fast an object is moving (no direction).

Question 6

Define velocity

Answer 6

• Vector quantity

* How fast an object is moving in a certain direction.

Question 7

What is the speed equation?

Answer 7

Speed = Distance / Time

Question 8

What is the first law of motion?

Answer 8

inertia - the resistance to a change in state of motion

Question 9

What is the force equation?

Answer 9

Force = Mass x Acceleration

Question 10

Define distance

Answer 10

• Scalar quantity

* How far an object moves (no direction)

Question 11

What does gradient measure in Distance-Time and Speed-Time graphs?

Answer 11

DT - Speed

ST - Acceleration

Question 12

What is the difference between vector and scalar quantities?

Answer 12

Vector: has direction
Scalar: only has magnitude

Question 13

Give some examples of vector quantities.

Answer 13

Acceleration, Force, Momentum, Weight

Question 14

Gradient formula

Answer 14

m = Y2 - Y1/X2 - X1

Question 15

acceleration

Answer 15

the rate at which velocity changes
Positive acceleration: speeding up
Negative acceleration: slowing down

Question 16

KE

Answer 16

KE = 1/2 x m x v^2

Question 17

GPE

Answer 17

GPE = m x g x h (mass, gravity, height)

OR

GPE = weight x height

Question 18

Total Energy

Answer 18

E = KE + GPE

Question 19

Newton’s second law

Answer 19

The acceleration of an object depends on its mass and force applied

Question 20

unit of measurement for KE and GPE

Answer 20

J (joules)

Question 21

converting distance

Answer 21

time when going down

divide when going up e.g. m to km

Question 22

what is the distance/speed/time triangle?

Answer 22

——d——–
s (av) / t

(distance over speed/time)

Question 23

what is the displacement/velocity/time triangle?

Answer 23

————-d——-
velocity / time

(displacement over velocity/time)

Question 24

the force that moves an object has been done by

Answer 24

‘work’

Question 25

the rate at which work is done is called;

Answer 25

power

Question 26

the energy in a compressed or stretched spring is;

Answer 26

elastic potential energy

Question 27

the amount of useful energy produced is called the;

Answer 27

energy efficiency

Question 28

Weight formula

Answer 28

W = m (mass) x g (gravity) (9.81)

Question 29

Average speed formula

Answer 29

Speed (av) = ½ (speed before - speed after)

e.g. car breaking

WARNING: no clue if we need this: it was needed in one of the revision sheets