C1 - kinematics (describing Motion)

Question 1

what is instantaneous speed

Answer 1

this is the speed at that moment in time (car speedometer)

Question 2

how can you use 2 light gates to work out the average speed

Answer 2

when object breaks beam a timer starts and then stops when second beam is broken.

Question 3

how can you use 1 light gate to work out instantaneous speed

Answer 3

timer starts when light is broken and is then stops when it isn’t. using length of object you work out the speed.

Question 4

how can you use a ticker timer to work out the speed

Answer 4

a ticker timer will punch a hole is a piece of tape at regular intervals. you can count the number of whole to work out time and the length of tape will represent distance

Question 5

how can you use a motion sensor to work out speed

Answer 5

it will see out a pulse of ultrasound at object will reflect back into sensor. know speed of wave and time so can work out speed.

Question 6

what is displacement

Answer 6

this is the distance moved by an object in a particular direction
10 km 30 degrees north of east

Question 7

what is a vector quantity and scaler

Answer 7

a vector quantity has a magnitude and a direction(velocity)where as scaler only has a magnitude (speed)

Question 8

how do you work out velocity

Answer 8

change in displacement/time taken