Forces And Motion

Question 1

What is the difference between vector and scalar quantities?

Answer 1

Scalars are things like speed and distance. Vectors are direction and magnitude. Displacement and velocity are vector

Question 2

How do you find the acceleration from a velocity-time graph?

Answer 2

Find the gradient

Question 3

How do you find the distance travelled on a velocity-time graph?

Answer 3

The area between a velocity time graph and the time axis

Question 4

What are the factors affecting vehicle stopping distance?

Answer 4

1. Speed
2. Mass
3. Road condition
4. Reaction time

Question 5

What is force?

Answer 5

A push or pull of one body on another

Question 6

What is friction?

Answer 6

A force that opposes motion

Question 7

What is the relationship between force, mass and acceleration?

Answer 7

Force = mass x acceleration

Question 8

What is the relationship between weight mass and g?

Answer 8

Weight = mass x g

Question 9

Why do falling objects reach terminal velocity?

Answer 9

The forces of air resistance equals the force of gravity and the object falls at a steady rate

Question 10

What is the moments calculation?

Answer 10

Moment=force x distance

Question 11

What does gravity cause?

Answer 11

1. Planets to orbit the sun
2. Satellites to orbit planets
3. Comets to orbit the earth

Question 12

How does the orbit of a comet differ from that of a planet?

Answer 12

Comets have elliptical orbits whereas planets are circular