P9: Motion

Question 1

What type of quantity is distance?

Answer 1

Scalar

Question 2

What factors does the speed a person walks, runs or cycles depend on?

Answer 2

Age, terrain, fitness and distance travelled

Question 3

What are the typical values for walking, running and cycling?

Answer 3

1.5m/s, 3 m/s and 6 m/s

Question 4

What is the typical value for the speed of sound?

Answer 4

330m/s

Question 5

What is the equation for the average acceleration of an object?

Answer 5

Acceleration = change in velocity / time

Question 6

How do you calculate the distance travelled by on object from a graph?

Answer 6

The area under the velocity-time graph

Question 7

What is the equation for uniform acceleration?

Answer 7

(final velocity)^2 - (initial velocity)^2 = 2 x distance x acceleration

Question 8

Describe the motion of an object moving in a fluid

Answer 8

It initially accelerates due to gravity. Eventually, the resultant force will be 0 and the object will move at its terminal velocity