Term 1 Physics - Motion and Force

Question 1

Distance

Answer 1

• How far an object travels in total
• Scalar

Question 2

Displacement

Answer 2

• Describes the net distance and direction travelled from point A to B
• Vector (direction)

Question 3

Speed

Answer 3

distance/time

Question 4

Velocity

Answer 4

displacement/time

Question 5

Acceleration

Answer 5

Δvelocity/time

Question 6

Displacement-time graphs

Answer 6

Horizontal line = zero velocity
Straight ( / ) line = constant velocity
Curved line = veloctity is changing

Question 7

Velocity-time graph

Answer 7

1. The gradient of a line represents the acceleration
2. The area under the line represents the distance travelled

Question 8

FORCE

Answer 8

> Contact force V.S. Noncontact force
Vector quantity

Question 9

Balanced forces

Answer 9

When the net force equals (=) 0N

Question 10

Newtons 1st Law

Answer 10

Every object continues in a state of rest or constant velocity, unless acted upon by an unbalanced force

< mass of an object = < inertia

Question 11

Newtons 2nd Law

Answer 11

ACCELERATION of an object depends on two variables:
1. Unbalanced force acting on an object
2. Mass of an object

Question 12

Newtons 3rd Law

Answer 12

If a force is exerted on an object, it will have an equal and opposite reaction
HOWEVER
They must be:
- Equal in magnitude
- Opposite in direction
- Be of the same nature