P2.1 Motion

Question 1

Speed

Answer 1

Average speed(m/s) = total distance(m)/total time(s)

Question 2

Distance

Answer 2

Distance travelled(m) = speed(m/s) x time(s)

Question 3

Acceleration

Answer 3

Acceleration(m/s squared) = change in velocity(m/s) / time(s)

Question 4

Distance-time graphs

Answer 4

• gradient = speed
• straight line = constant speed
• horizontal line = not moving
• steeper the line = faster the object is travelling

Question 5

Velocity

Answer 5

Velocity = change in displacement/time

Question 6

Kinetic energy

Answer 6

Kinetic energy(J) = 0.5 x mass(kg) x (speed(m/s)) squared