Speed

Question 1

what is acceleration

Answer 1

change in velocity of an object per second (m/s2)

Question 2

what can be done to reduce drag

Answer 2

streamlining

Question 3

what happens to drag on object as speed increases

Answer 3

drag increases

Question 4

name for frictional forces an object experiences when moving through fluid (liquid/gas)

Answer 4

drag

Question 5

name for the constant speed a falling object receives when a resistive force is equal to its weight

Answer 5

terminal velocity

Question 6

how can distance travelled be found from a velocity-time graph

Answer 6

area under the graph

Question 7

what information does the gradient of a line on a velocity-time graph show

Answer 7

acceleration

Question 8

what information does the gradient of a line on a distance-time graph show

Answer 8

speed

Question 9

how can an object be accelerating even if it is travelling at a constant speed

Answer 9

if it’s changing direction

Question 10

what are the typical speeds of:
-walking
-running
-cycling
-car
-train
-sound in air

Answer 10

-walking=1.5 m/s
-running=3 m/s
-cycling= 6 m/s
-car= 13-30 m/s
-train=50 = m/s
-sound in air= 330 m/s

Question 11

what factors affect the speed at which someone can walk

Answer 11

-age
-fitness
-terrain
-distance already travelled

Question 12

difference between speed and velocity

Answer 12

speed=scalar
velocity=vector

Question 13

difference between distance and displacement

Answer 13

distance=scalar
displacement=vector