Forces And Their Effects

Question 1

Define velocity

Answer 1

Speed in a given direction

Question 2

Define a resultant force

Answer 2

One force that replaces many forces

Question 3

When two bodies interact what can you say about the size and direction of the action and reaction force?

Answer 3

Equal and opposite

Question 4

What will happen to an objects motion if the resultant force is zero?

Answer 4

stay at rest, or continue at a constant velocity

Question 5

What will happen to an objects motion if the resultant force is zero?

Answer 5

Accelerate or decelerate

Question 6

State the two factors that will affect the acceleration of an object

Answer 6

Size

Mass

Question 7

How do all bodies fall in a vacuum

Answer 7

With constant acceleration

Question 8

Describe the three phrases of what happens to the air resistance on an object as it falls to earth

Answer 8

1 minimum acceleration, no sir resistance
acceleration decreases, air resistance increases as speed increases
The two forces balance, acceleration is zero and terminal velocity reached