Motion & Measuring

Question 1

Why is a pendulum used as an example of motion and measuring?

Answer 1

It’s useful for timekeeping because they are isochronous (constant time period for a time pendulum to complete a full swing)

Question 2

Why does the length of the string on the pendulum affect the speed of each swing?

Answer 2

Because it has more / less distance to travel

Question 3

What is the formula for constant speed?

Answer 3

Speed = Distance / Time
OR
S = D / T

Question 4

What is the formula for average speed?

Answer 4

Average speed = Total distance / Time Taken

Question 5

How is a ticker timer used to determine the speed of an object?

Answer 5

You can use the pattern of the dots on ticker tape to describe whether the object is travelling at constant speed, speeding up or slowing down.

Question 6

What is the relationship between acceleration, velocity and time?

Answer 6

Acceleration = change in velocity / time taken

  t

Question 7

What is the relationship between final speed, acceleration and distance moved

Answer 7

(final speed)2 = (initial speed)2 + (2 x acceleration x distance moved)

v2 = u2 + (2 x a x s)