Chapter 3 - Speed

Question 1

What is the equation for Speed?

Answer 1

Speed (v) = distance (d)/time (t)

Question 2

What is Instantaneous Speed?

Answer 2

Instantaneous speed is the speed at any instant. (Ex. The speedometer on a car shows instantaneous speed).

Question 3

Is motion relative?

Answer 3

Yes! Unless stated otherwise, we always mean relative to the surface of the Earth.

Question 4

What is the equation for Average Speed?

Answer 4

Average speed (u) = total distance covered (d)/time interval (t)

Question 5

What is Velocity?

Answer 5

Velocity is speed & direction.

Question 6

What is Constant Velocity?

Answer 6

Constant speed & constant direction.

Question 7

What is Changing Velocity?

Answer 7

When either the speed or direction changes.

Question 8

What is Acceleration?

Answer 8

Acceleration is how quickly and in what direction velocity changes.

Question 9

What is the equation for Acceleration?

Answer 9

Acceleration (a) = change in velocity/time interval (t).

Question 10

What is Deceleration?

Answer 10

Deceleration is when speed slows.

Question 11

What is Free Fall?

Answer 11

Free fall is when a falling object is free of ALL restraints. It falls only under the influence of gravity.

Question 12

What is the equation for Instantaneous Velocity?

Answer 12

velocity (v) = gravity (g) x time interval (t)

g = 10 m/s^2

Question 13

What is the equation for Distance Traveled?

Answer 13

Distance traveled (d) = 1/2 x gravity (g) x time interval (t)

g = 10 m/s^2