Motion and Forces SP1, SP2

Question 1

How are speed and velocity different

Answer 1

Velocity is speed and direction
Velocity is vector
Speed is scalar

Question 2

Difference between mass and weight

Answer 2

Mass is the amount of stuff

Weight is the force acting on an object due to gravity

Question 3

Eight energy stores

Answer 3

Kinetic - anything moving
Thermal - when it is hot
Chemical - release energy through a chemical reaction
Gravitational potential -anything that could fall
Elastic potential - anything stretched
Electrostatic - two charges that attract or repel
Magnetic - magnets that attract or repel
Nuclear - atomic nuclei release energy

Question 4

Conservation of energy

Answer 4

Energy is never created or destroyed

Question 5

Renewable energy resources

Answer 5

Bio-fuels
Wind
Solar
Hydro-electricity 
Tides

Question 6

Non renewable energy resources

Answer 6

Fossil fuels

Nuclear energy

Question 7

Difference between distance and displacement

Answer 7

Distance is how far (scalar)

Displacement is distance and direction in a straight line from the start to the finish (vector)

Question 8

What is vector and scalar

Answer 8

Vector has a size and direction

Scalar only has a size

Question 9

Acceleration is …

Answer 9

How quickly you are speeding up

Question 10

Newton’s three laws

Answer 10

1. A resultant force is needed to make something start moving, speed up or slow down
2. The acceleration of an object is dependent upon two variables - the net force acting upon the object and the mass of the object
3. For every action there is an equal and opposite reaction

Question 11

Inertia is…

Answer 11

The tendency for motion to remain unchanged