Motion

Question 1

What is Speed?

Answer 1

Speed = Distance Travelled / Time Taken

Question 2

How does Distance differ with Displacement?

Answer 2

Distance is the total length, displacement is the shortest distance and direction from the starting point.

Question 3

What is Velocity?

Answer 3

Velocity = Displacement / Time

Question 4

What is Acceleration?

Answer 4

a = (v - u) / t

acceleration = (final velocity - initial velocity) / time taken

Question 5

What can a distance-time graph show you?

Answer 5

Distance, Time, Speed (as the gradient)

Question 6

What does a speed-time graph show you?

Answer 6

The gradient shows acceleration, the area under the graph shows distance.

Question 7

What is the acceleration of free fall?

Answer 7

9.8m/s²

Question 8

How do objects fall without air resistance?

Answer 8

Free fall can only happen when the only acting force is weight.

Question 9

What is air resistance?

Answer 9

1. It is a form of friction.
2. It opposes the motion of Moving Objects
3. It increases with the surface area/size of the moving objects
4. It increases with air density
5. It increases with speed of motion

Question 10

What is terminal velocity?

Answer 10

When the air resistance is equal to the weight of the object. When there is uniform velocity.