CHAPTER 2 PHYSICS

Question 1

What is distance?

Answer 1

the total length travelled.

Question 2

What is displacement?

Answer 2

the shortest distance between the start & end point.

Question 3

What is the SI unit for distance & displacement?

Answer 3

m

Question 4

What is the SI unit for speed & velocity?

Answer 4

m/s

Question 5

Formula for speed

Answer 5

distance/time

Question 6

Formula for velocity

Answer 6

displacement/time

Question 7

How to answer ticker tape question?

Answer 7

the object is moving at (constant/ increasing. decreasing) speed.

Question 8

SI unit for ticker tapes

Answer 8

s

Question 9

How to find total time of ticker tape?

Answer 9

total time= seconds x no. of ticks.

first tick is not counted as t=0

Question 10

What is acceleration?

Answer 10

the rate of change in speed/ velocity in one second.

Question 11

SI unit for acceleration

Answer 11

m/s(2)

Question 12

State the formula for acceleration

Answer 12

final speed-initial speed/time

Question 13

How to write deacceleration answer?

Answer 13

dont write ‘-‘ in the answer even though its a negative number but instead write ‘deaccelerates’ instead of ‘accelerates’.

Question 14

What is the SI unit for average speed?

Answer 14

m/s

Question 15

How to find average speed?

Answer 15

total distance/total time

Question 16

SI unit of distance time graph

Answer 16

m/s

Question 17

Formula for distance time graph

Answer 17

distance/time

Question 18

distance time graph:
- steep=???
- less steep=???

Answer 18

• steep= increasing velocity.
• less steep= decreasing velocity.

Question 19

SI unit of speed time graph

Answer 19

m/s(2)

Question 20

How to calculate distance for speed time graph?

Answer 20

calculate the bottom area of the graph.

Question 21

How to calculate the bottom area of speed time graph if the bottom area is a triangle?

Answer 21

area of triangle= 1/2 x b x h.

Question 22

How to calculate the bottom area of speed time graph if the bottom area is a rectangle/square?

Answer 22

area of rectangle/square= b x h.

Question 23

speed time graph:
- steep=???
- less steep=???

Answer 23

• steep= increasing acceleration.
• less steep= decreasing acceleration.

Question 24

Do you need to calculate the speed in distance time graph?

Answer 24

no.

Question 25

How much is the acceleration in a vacuum?

Answer 25

10m/s(2)

Question 26

What is free fall?

Answer 26

a vacuum.

Question 27

If air resistance can be ignored on earth, how much is the acceleration?

Answer 27

10m/s(2)