EoY 10 forces and motion

Question 1

speed formula

Answer 1

distance (m) / time (s)

Question 2

acceleration formula

Answer 2

change in v / time

Question 3

the effects of forces between bodies

Answer 3

change in speed
shape
or direction

Question 4

vector quantities

Answer 4

a quantity with both magnitude and direction

Question 5

scalar quantities

Answer 5

a quantity with only magnitude

Question 6

force is a…

Answer 6

vector quantity because the effect of forces = change in velocity, direction, or shape

Question 7

friction is…

Answer 7

a force which opposes motion

Question 8

force =

Answer 8

mass x acceleration

Question 9

weight =

Answer 9

mg

Question 10

stopping distance =

Answer 10

thinking distance + braking distance

Question 11

factors affecting stopping distance

Answer 11

speed
-higher speeds require more breaking force

road conditions
-wet or icy roads cause friction between tires

reaction time

mass
-heavier vehicles have more momentum

Question 12

forces acting on falling objects

Answer 12

weight, air resistance

Question 13

terminal velocity

Answer 13

the maximum speed achieved by a falling object, means the air resistance and weight are balanced so the object no longer accelerates

Question 14

Hookes law

Answer 14

extension of a spring / elastic = directly proportional to the force applied. This lasts until the spring reaches its elastic limit, ensuring permanent deformity

Question 15

elastic behaviour

Answer 15

the ability of a material to recover its original shape after the forces causing deformation have been removed