Dynamics

Question 1

Is acceleration a vector or a scalar?

Answer 1

Vector

Question 2

Is time a vector or a scalar?

Answer 2

scalar

Question 3

Is velocity a vector or a scalar?

Answer 3

Vector

Question 4

Is distance a vector or a scalar?

Answer 4

scalar

Question 5

Is speed a vector or a scalar?

Answer 5

scalar

Question 6

Is energy a vector or a scalar?

Answer 6

scalar

Question 7

Is displacement a vector or a scalar?

Answer 7

vector

Question 8

Is mass a vector or a scalar?

Answer 8

scalar

Question 9

Is force a vector or a scalar?

Answer 9

vector

Question 10

what is the unit for distance

Answer 10

m

(metres)

Question 11

what is the unit for time

Answer 11

s

(seconds)

Question 12

what is the unit for acceleration

Answer 12

ms^-2

^ means “to the power of” on this card

(metres per second squared)

Question 13

what is the unit for speed

Answer 13

ms^-1

^ means to the power of on this card

(metres per second )

Question 14

what is the unit for velocity

Answer 14

ms^-1

^ means to the power of on this card

(metres per second )

Question 15

what is the unit for displacement

Answer 15

m

(metres)

Question 16

What is the symbol on the formula sheet for
1. initial velocity
2. final velocity

Answer 16

1. u
2. v

remember u comes before v, you start before you finish

Question 17

What is the unit for force

Answer 17

N

(Newtons)

Question 18

What is the unit for energy

Answer 18

J

(Joules)

Question 19

What is the unit for weight

Answer 19

N

remember weight is a FORCE

(Newtons)

Question 20

How do you work out the magnitude of a vector

Answer 20

Use pythagoras

remember magnitude means size

Question 21

How do you work out the angle to work out direction for a vector

Answer 21

Use tan x = opp / adj

Question 22

What does the gradient of a velocity/time graph give you?

Answer 22

acceleration

Question 23

What does the area under the curve of a velocity/time graph give you?

Answer 23

Distance travelled

Question 24

What is the acceleration on a velocity / time graph if it looks like this?

1. \
2. __
3. /

Answer 24

1. negative
   (decelerating - slowing down)
2. zero
   (constant speed)
3. positive
   (accelerating - speeding up)

Question 25

What is the **symbol** on the formula sheet for distance?

Answer 25

d

Question 26

What is the **symbol** on the formula sheet for instantaneous speed

Answer 26

v

Question 27

What is the **symbol** on the formula sheet for displacement?

Answer 27

s

Question 28

What is the **symbol** on the formula sheet for instantaneous velocity

Answer 28

v

Question 29

What is the **symbol** on the formula sheet for acceleration?

Answer 29

a

Question 30

What is the **symbol** on the formula sheet for force?

Answer 30

F

Question 31

What is the **symbol** on the formula sheet for weight?

Answer 31

W

Question 32

How do you work out the distance travelled from a velocity / time graph?

Answer 32

calculate the area under the curve

Question 33

How do you work out the acceleration from a velocity / time graph?

Answer 33

Find the gradient

Question 37

What does magnitude mean?

Answer 37

How big

Question 38

How do you work out displacement?

Answer 38

It's the shortest distance from start to finish

Question 39

How do you work out a bearing?

Answer 39

Start from **North** - move **clockwise** until you're pointing in the direction you need to head

Question 40

If a force acts on an object and moves it what kind of energy is this?

Answer 40

Work done Ew

Question 41

If something is high above the ground what kind of energy does it have?

Answer 41

Potential energy Ep

Question 42

If something is moving what kind of energy does it have?

Answer 42

Kinetic energy Ek

Question 43

What is the law of conservation of energy

Answer 43

Energy cannot be made or destroyed, it is just transformed from one type of energy into another type of energy.