Travelling

Question 1

Average speed word equation + measurement unit

Answer 1

distance/time (usually in m/s)

Question 2

Instantaneous speed definition

Answer 2

current speed at any given moment

Question 3

Acceleration word equation + measurement unit

Answer 3

Final speed - initial speed/time (m/s^2)

Question 4

Newton’s first law of motion

Answer 4

An object at rest will stay at rest unless acted on by an external net force. An object in motion will stay in motion at a constant speed in a straight line unless acted on by an external net force.

Question 5

What does net force determine?

Answer 5

Whether an object will move or remain stationary. Two or more net forces acting on the same object can cancel.

Question 6

Newton’s second law of motion

Answer 6

The acceleration of an object is directly proportional to the net force acting on it and inversely proportional to the mass.

Question 7

Word equation for force + measurement unit

Answer 7

Force = mass x acceleration (measured in N: Newtons)

Question 8

Newton’s third law of motion

Answer 8

For every action force, there is an equal and opposite reaction force.

Question 9

How does the third law of motion work?

Answer 9

• Acts as a pair on 2 DIFFERENT objects
• Paired forces are of equal size/magnitude and opposite direction
• Forces do not cancel each other out even if one appears not to move

Question 10

Mass definition + measurement unit

Answer 10

Amount of matter in an object (kg or grams)

Question 11

Weight definition + measurement unit

Answer 11

Force of gravity acting on an object (measured in newtons)

Question 12

Gravity definition

Answer 12

Force of attraction between two objects

Question 13

Weight word equation

Answer 13

Weight = mass x gravity