Motion and Forces

Question 1

What is the difference between weight and mass?

Answer 1

Mass measures how much matter an object contains, whereas weight measures the force of gravity on that object.

Question 2

What is the difference between a vector and a scalar?

Answer 2

A vector has both direction and magnitude. A scalar only has magnitude

Question 3

What is the difference between distance and displacement?

Answer 3

Distance is the complete length of the path between points. Displacement is the length of the shortest route from point A to B.

Question 4

What is the difference between velocity and speed?

Answer 4

Speed is a SCALAR (s and s). Velocity is a VECTOR (v and v)

Question 5

Define acceleration.

Answer 5

The rate of change of velocity.

Question 6

Define force.

Answer 6

A force can change the shape or velocity of an object.

Question 7

Define Momentum

Answer 7

Momentum is the product of mass and velocity.

Question 8

Define energy.

Answer 8

A property transferred to an object in order to perform work or heat.

Question 9

How are distance speed and time linked?

Answer 9

Speed = Distance/Time (remember this by thinking speed is distance over time)

Question 10

What is the formula that links velocity, time and acceleration?

Answer 10

Acceleration = Change in velocity / Change in time (a = Δv/Δt)

Question 11

What is the typical speed for walking and running?

Answer 11

Walking - 1.5 m/s
Running - 5 m/s

Question 12

What are typical speeds for cycling and driving a car?

Answer 12

Cycling - 7m/s
Car - 13-30m/s

Question 13

What will the acceleration of any object in free fall be roughly?

Answer 13

9.8 metres/second squared