Science - Physics Pt. 2

Question 1

mass

Answer 1

kg

Question 2

distance/length

Answer 2

m

Question 3

speed/velocity

Answer 3

m/s

Question 4

acceleration

Answer 4

m/s^2

Question 5

time

Answer 5

s

Question 6

gravitational field strenght

Answer 6

newtons (N)/kg

Question 7

momentum

Answer 7

Kilogram meters (Kgm)/s

Question 8

force

Answer 8

newtons (N)

Question 9

mechanical force

Answer 9

spring pushing a trolley

Question 10

gravitational force

Answer 10

ball falling to earth

Question 11

electrostatic force

Answer 11

electrons orbiting a nucleas

Question 12

magnetic force

Answer 12

compass points north

Question 13

nuclear force

Answer 13

protons & neutrons held together in a nucleas

Question 14

equations of motion

Answer 14

• solve motion problems with constant/uniform acceleration
  v = u + at (t)
  v = u^2 + 2as (distance (s))
  s = ut + 1/2 at^2 (v)

Question 15

balanced force

Answer 15

forces acting on sometime are balanced and object does not change its moving

Question 16

unbalanced force = 0

Answer 16

forces acting on object is the same value as force acting in opposite direction

Question 17

why does skidding occur

Answer 17

brakes are applied too hard - tires cannot grip surface

Question 18

friction

Answer 18

occurs when solid objects rub against other solid objects or when moving though liquids/gases

Question 19

how do friction help

Answer 19

increase friction for bikes and cars when applying brakes - between rotating wheels and body of vehicle

Question 20

things friction between tires and road depend on

Answer 20

• road surface
• thread of tires
• weight of vehicle

Question 21

how does alcohol affect your driving

Answer 21

• slows brain function
• gives you false confidence
• harder to multitask
• make you feel sleepy/fatigued
• reduces ability to judge how fast you’re moving/distance

Question 22

BAC

Answer 22

blood alcohol concentration

Question 23

drugs on alcohol

Answer 23

multiply affect and increases risk of crashing even in small concentrations

Question 24

motorcyclists on alcohol

Answer 24

greater risk of crashing as they are more unbalanced

Question 25

help you sober and drive

Answer 25

time

Question 26

blood alcohol limits

Answer 26

learner, p1, p2 - 0

‘black’ licence drivers - 0.02

Question 27

why are crashes slowly reducing

Answer 27

• speed cameras
• graduated licensing
• RS 2000 strategy RBT
• road safety strategy
• stricter rules