Chapter 3: Motion

Question 1

what is a scalar quantity

Answer 1

quantity that only has magnitude

Question 2

what is a vector quantity

Answer 2

quantity that has magnitude and direction

Question 3

what is resultant force

Answer 3

the total and final force acting on an object

Question 4

how do you work out the resultant force when the components are perpendicular

Answer 4

use Pythagoras theorem

Question 5

how do you work out the resultant force when the components aren’t perpendicular

Answer 5

you use trigonometry

Question 6

what in ‘s’ in a suvat equation

Answer 6

distance/displacement

Question 7

what is ‘u’ in a suvat equation

Answer 7

intial velocity

Question 8

what is ‘v’ in a suvat equation

Answer 8

final velocity

Question 9

what is ‘a’ in a suvat equation

Answer 9

acceleration

Question 10

what is ‘t’ in a suvat equation

Answer 10

time

Question 11

what are the 4 suvat equations

Answer 11

s = ut + at^2
v = u + at
s = 0.5 x (u + v) x t
v^2 = u^2 + 2as

Question 12

what is stopping distance

Answer 12

distance it takes for a driver to react to a stimuli and bring the vehicle to a halt

Question 13

how do you calculate stopping distance

Answer 13

stopping distance = thinking distance + braking distance

Question 14

what is thinking distance

Answer 14

how far the vehicle travels before the driver reacts

Question 15

what is braking distance

Answer 15

how far it takes for the brakes to bring a vehicle to a complete stop

Question 16

what is the thinking distance equation

Answer 16

s = intial velocity x reaction time

Question 17

what is the braking distance equation

Answer 17

s = (-u^2) / (2a)

Question 18

what is the braking force equation

Answer 18

f = ma

Question 19

what is a projectile

Answer 19

object upon which the only force acting is gravity

Question 20

what are the two projectile equations for a simple free fall

Answer 20

s = 0.5 x gt^2
g = v / t