P2.1 - Motion

Question 1

What is the equation for speed?

Answer 1

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

Question 2

What is the equation for distance?

Answer 2

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

Question 3

What is a vector?

Answer 3

Quantities that have both magnitude and a direction.

Question 4

What is a scalar?

Answer 4

Quantities that just have a magnitude

Question 5

What is the difference between distance and displacement?

Answer 5

Distance is a scalar
Displacement is a vector. It is distance with direction

Question 6

What is the difference between speed and velocity?

Answer 6

Speed is a scalar
Velocity is a vector. It is speed with direction

Question 7

What is the formula for acceleration if you know change in velocity?

Answer 7

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

Question 8

What is the formula for acceleration if you know the final and initial velocity?

Answer 8

Acceleration (m/s squared) = (final velocity (m/s) - initial velocity (m/s) ) / time (s)

Question 9

What is the formula for calculating velocity from a graph?

Answer 9

Velocity = change in displacement / time

Question 10

What is the equation for kinetic energy?

Answer 10

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