This module will look at the topic of mechanics. It will cover the following topics;

  • Velocity
  • Acceleration
  • Centripetal force
  • Momentum
  • Impulse
  • Density
  • Gravity
  • Centre of gravity
  • Forces
  • Moments and torque
  • Newtons three laws of motion
  • Drag
  • Terminal velocity
  • Work and Power
  • Energy

 

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Module 1

This module will give you an introduction to mechanics..

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Module 2

Attempt the following question and then view the module.

A taxi is accelerating from rest at a rate of 4msec2.

a) What is its velocity after 9 seconds?

b) How far will it have travelled at this point?

c) What would its average velocity be during this time?

d) How far will it have reached when its velocity is 45m.sec?

 

 

Module 3

This module will discuss the issue of centripetal force.

 

 

Module 4

This module will discuss the topic of momentum.

 

 

Module 5

This module will look at the topic of impulse.

 

 

Module 6

This module will discuss the issue of mass and weight and how they relate to each other.

 

 

Module 7

This module will discuss the issue of density.

 

Module 8

This module will discuss the issue of identifying the centre of gravity.

 

 

Module 9

This module will discuss the topic of forces on a body due to gravity.

 

 

 

Module 10

This module will discuss the issue of moments and torque.

 

Module 11

Attempt the following question and then view the module.

Q. A diver of mass 120kg stands on the end of a diving board 2m from the pivot point.  Calculate the upward force on the retaining spring 30cm from the pivot point?

 

 

 

Module 12

Attempt the question and then view the module.

Q. A vehicle with a mass of 8 tons and a wheelbase wheelbase of 4m. The centre of gravity is 2.5m behind the front axle.

a) Determine the load in kg on the front and rear axles?

b) If a box with a mass of 350kg was put 750mm from the rear axle, what would be the new loads on the axles.?

 

 

 

Module 13

This module will discuss the topic of torque.

 

 

 

 

 

Module 14

This module will look at a couple of forces known as a pair.

 

 

 

Module 15

This module will look at Newtons Laws of Motion.

 

 

 

Module 16

This module will look at drag and terminal velocity.

 

 

 

Module 17

This module will discuss the topic of objects falling through a fluid.

 

 

Module 18

This module will discuss work.

 

 

Module 19

This module will discuss the topic of power.

 

 

Module 20

Attempt the following question and then view the module.

Q A motor is used to lift a load with a mass of 35kg a height of 3.7m
a) calculate the work done in lifting the load?
The speed of the load moving is 0.35m.sec.
b) Calculate the power delivered by the motor?

 

 

Module 21

This module will discuss the issue of energy.

 

 

 

 

Module 22

A pendulum with a mass of 900grammes and a length of 65cm is pulled out at an angle of 38 degrees from the vertical.  This obviously took work to do this and it now has potential energy.

A) Determine the gravitational potential energy in the pendulum?

B) Determine the maximum speed of the pendulum as it passes the vertical when it is released?