Chapter 2 (A - 2.1 to 2.5) - Motion graphs

Question 1

formula for average speed

Answer 1

distance/time

Question 2

what is a scalar quantities

Answer 2

quantities that only posses magnitude but no direction

Question 3

what is a vector quantity

Answer 3

quantities that posses both magnitude and direction

Question 4

formula for velocity

Answer 4

displacement/time

Question 5

acceleration formula

Answer 5

change in velocity/time take

(v-u)/t
where v = final velocity, u = initial velocity, t = time taken

Question 6

What is negative acceleration called

Answer 6

retardation or decelleration

Question 7

what is uniform acceleration

Answer 7

constant/steady acceleration

Question 8

On distance-time graph

what is the gradient/slope

what does a straight horizontal line mean
what does an upwards slopping straight line mean
what does a steep upwards sloping line mean
what does a curve mean

Answer 8

speed

straight horizontal line - body at rest
upwards slopping straight line - steady speed
steep upwards sloping line - higher steady speed
curve - the body is accelerating

Question 9

On a speed-time graph

what is gradient/slope
what is the area under the graph

what does a horizontal line mean
what does an upwards sloping straight line mean

when do we know the body is at rest

Answer 9

slope = acceleration
area under graph = distance

horizontal line = steady speed, acceleration = 0
upwards sloping straight line = steady acceleration

when do we know the body is at rest?
when the graph’s line is at 0.