1.1 Kinematics

Question 0

What do you need to measure average speed electronically?

Answer 0

Trolley, mask, electric timer, 2 light gates a measured distance apart.

Question 1

How do you measure average speed electronically?

Answer 1

Start a timer when front edge of mask breaks 1st light gate and stop timer when front edge of mask breaks 2nd light gate. Calculate using equation.

Question 2

How do you measure average speed manually?

Answer 2

Measure a set distance and time how long it takes an object to travel it. Use calculation.

Question 3

What do you need to measure average speed manually?

Answer 3

stop clock, trolley, space(track)

Question 4

Which equation links distance, time and average speed?

Answer 4

average speed(v-bar) (m/s) equals distance(d) (m) divided by time(t) (s).

Question 5

How do you measure instantaneous speed?

Answer 5

Timer starts when front edge of mask breaks light gate and stops when back edge of mask leaves light gate. Distance equals length of mask.

Question 6

What do you need to measure instantaneous speed?

Answer 6

trolley, mask, light gate, timer.

Question 7

How are average and instantaneous speed different?

Answer 7

-most objects speed up or slow down.

Question 8

What is a vector quantity?

Answer 8

A vector quantity has a magnitude and direction.

Question 9

What is a scalar quantity?

Answer 9

Has a magnitude.

Question 10

What is distance?

Answer 10

Total length of path travelled.

Question 11

What are the symbol and unit of distance?

Answer 11

d and metres(m)

Question 12

Is distance scalar or vector?

Answer 12

scalar.

Question 13

What is displacement?

Answer 13

Length and direction of straight line from start to finish.

Question 14

What are the unit and symbol for displacement ?

Answer 14

s and metres(m)

Question 15

Is displacement a scalar or vector quantity?

Answer 15

vector

Question 16

What is speed?

Answer 16

Distance travelled by an object every second.

Question 17

What are the unit and symbol of speed?

Answer 17

v and metres or second (m/s)

Question 18

Is speed a scalar or vector quantity?

Answer 18

scalar

Question 19

What is the equation for speed?

Answer 19

v=d/t

Question 20

What is velocity?

Answer 20

Change of displacement each second. (Speed and direction of an object.)

Question 21

What are the units and symbol of velocity?

Answer 21

v and metres per second (m/s)

Question 22

Is velocity a vector or scalar quantity?

Answer 22

vector

Question 23

What is the equation for velocity?

Answer 23

v=s/t

Question 24

What is acceleration?

Answer 24

The change in velocity in unit time.

Question 25

What are the symbol and unit of acceleration?

Answer 25

a and metres per second squared (m/s^2)

Question 26

Is acceleration a vector or scalar quantity?

Answer 26

vector

Question 27

What is the equation for acceleration?

Answer 27

v-u
a= ----
       t
v=final velocity (m/s)
u= initial velocity (m/s)
t=time (s)

Question 28

What is the magic statement for velocity-time graph calculations?

Answer 28

displacement equals the area under the velocity-time graph.