Kinematics

Question 1

What is kinematics?

Answer 1

Describes motion

Question 2

What is speed and the SI unit

Answer 2

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

Question 3

What is displacement?

Answer 3

Change in position (final - initial) - magnitude and direction

Question 4

What is velocity?

Answer 4

velocity = displacement(m)/time(m) m/s & direction

Question 5

if velocity is not constant how can it be calculated?

Answer 5

Draw a graph and draw a tangent at time (T) - the slope of tangent at T is equal to the velocity at point T

Question 6

What is acceleration?

Answer 6

acceleration = change in velocity(m/s)/change in time (s) m/s^2 & direction

Question 7

When is acceleration = 0?

Answer 7

When velocity is constant

Question 8

Kinematic equations need what condition?

Answer 8

Constant accleration

Question 9

Kinematic equation when given v, u, a & t?

Answer 9

v = u + at

Question 10

Kinematic equation when given s, u, a & t?

Answer 10

s = ut + 1/2at^2

Question 11

Kinematic equation when given v, u, a & s?

Answer 11

v^2 = u^2 + 2as

Question 12

Kinematic equation when given v, u, s & t?

Answer 12

s = ((u+v)/2)t

Question 13

What conditions are needed for freefall?

Answer 13

Motion under gravity only - object accelerates at (-9.8ms^2)