Turning Effect of Forces Sec 3 Express Physics

Turning Effect of Forces Sec 3 Express Physics

Induction Activity hand pivot long ruler turning effect

Induction Activity Can you open the door? pivot turning effect

Turning effect of Forces Which wrench would you choose to unscrew the stubborn bolt?

Turning effect of Forces d Line of action of the force F F-Applied Force d-Perpendicular Distance from the pivot to the line of force Pivot Moment of a Force (Torque) = F x d┴ (Nm) Work Done = F x d// (J)

Turning effect of Forces Which wrench would you choose to unscrew the stubborn bolt? d 1 d 2

Turning effect of Forces Top View d 1 d’ Hinge (Pivot)d 2 d F 2 F 1

Turning effect of Forces Which direction would you choose to turn the wrench? 5 6 1 2 4 3

Clockwise & Anticlockwise Moment

Principle of Moments How does a crane keep its balance?

Principle of Moments Pair work Investigative Activity Get the necessary apparatus. You have 15 min to complete the worksheet. Share your findings with the class afterwards.

Principle of Moments For a body at equilibrium about a pivot, the principle of moments states that: Sum of clockwise = Sum of anti-clockwise moments about the pivot

Principle of Moments

Closure Reflect on today’s lesson and write down one important thing you have learnt. Share with the class.

Closure Turning Effect of Forces: daily applications Moments = F x d (Nm) Clockwise Moment Anticlockwise Moment Principles of Moments