Week 2 - Linear Kinematics

Question 1

Define kinematics

Answer 1

Motion of bodies without considering forces that caused motion

Question 2

Define kinetics

Answer 2

Describes relationship between motion and its causes

Question 3

Describe a scalar quantity and give an example

Answer 3

Has magnitude only
Distance, speed, time etc

Question 4

Describe a vector quantity and give an example

Answer 4

Magnitude and direction
Displacement velocity acceleration etc

Question 5

What are the directions which give positive values for vectors

Answer 5

Upwards and to the right

Question 6

What is the difference between distance and displacement

Answer 6

Distance = how far you have travelled in total
Displacement = how far away you are from the original starting point

Question 7

How do we work out velocity

Answer 7

Velocity = displacement / time

Question 8

How can you work velocity out if displacement occurs in more than one direction

Answer 8

Each can be considered independently and then use Pythagorean theorem to work out the average

Question 9

Define acceleration

Answer 9

Rate of change of velocity

Question 10

How do we work out acceleration

Answer 10

Acceleration = change in velocity / time

Question 11

What is acceleration called when it is negative

Answer 11

Acceleration

Question 12

What do we need for the equations of constant acceleration

Answer 12

SUVAT (displacement, initial velocity, final velocity, acceleration, time)

Question 13

What are the constant acceleration equations for S

Answer 13

S = ut + 0.5at^2
S = 0.5(u+v)t

Question 14

What are the constant acceleration equations for V

Answer 14

V = u+at
V^2=u^2+2as