P11 Speed

Question 1

what is the difference between distance and displacement?

Answer 1

distance is a scalar quantity

displacement is a vector quantity

Question 2

what is the difference between speed and velocity?

Answer 2

speed is a scalar quantity
velocity is a vector quantity

Question 3

what factors can affect the speed at which someone walks, runs or cycles?

Answer 3

age
fitness
terrain
distance travelled

Question 4

what is the typical speed of a car and a train?

Answer 4

15-30 m/s

Question 5

what is the typical speed for sound travelling through air?

Answer 5

330 m/s

Question 6

what is acceleration?

Answer 6

change in velocity of an object per second

Question 7

what info does the gradient of the line on a distance/time graph provide?

Answer 7

speed

Question 8

what info does the gradient of the line on a velocity/time graph provide?

Answer 8

acceleration

Question 9

what is terminal velocity?

Answer 9

when an object falling at a steady speed reaches the force equal to its resistance

Question 10

what is the name of the frictional force an object experiences when moving through a fluid?

Answer 10

drag

Question 11

what can we done to reduce the drag on an object?

Answer 11

streamlining

Question 12

in which direction does the drag on an object always act?

Answer 12

in the direction opposite to which its moving