Speed and Acceleration

Question 1

displacement

Answer 1

a measure of how far the finishing point is from the starting point. it also states direction

Question 2

vector quantities

Answer 2

state both magnitude (size) and direction ( e.g. up, 214 degrees, east, right, etc)

Question 3

scalar quantities

Answer 3

state magnitude (size) but no sense of direction. (e.g. mass, temperature, time, distance)

Question 4

average speed formula

Answer 4

speed=distance/time

v=s/t

Question 5

symbol and unit for speed/velocity, distance/displacement, time, acceleration

Answer 5

speed/velocity: v, m/s
distance/displacement: s, m
time: t, s
acceleration: a, m/s^2

Question 6

how fast is a tractor travelling if it takes 2m30s to cover 3km?

Answer 6

20m/s

Question 7

typical speeds

Answer 7

walking: 1.5m/s
running: 3.0m/s
cycling: 6.0m/s

Question 8

distance

Answer 8

how far an object moves when travelling from one point to another. distance has no indication of direction

Question 9

instantaneous speed

Answer 9

the speed at any one given point

Question 10

acceleration formula

Answer 10

acceleration=change in velocity/time taken

a=v-u/t

Question 11

i am walking at 1 m/s and speed up to 5 m/s. if it takes 8 seconds to do so, what is my acceleration?

Answer 11

0.5m/s^2

Question 12

how do you find the acceleration on a velocity-time graph?

Answer 12

the gradient.

Question 13

how do you find the area under a curve on a graph?

Answer 13

step 1: count the whole squares
step 2: count partially filled squares
step 3: all partial boxes count as half boxes
step 4: sum number of boxes x distance per box

Question 14

how do you find the velocity/speed on a distance-time graph?

Answer 14

the gradient