This document discusses impulse and impulsive force. It defines impulse as the change in momentum and impulsive force as the rate of change of momentum. It explains that decreasing the time of impact increases the impulsive force through experiments using eggs dropped on different surfaces. It provides examples calculating impulse and impulsive force from changes in an object's momentum over time during collisions. It discusses applications of impulsive force in everyday situations like catching balls, breaking boards, and pounding garlic.

1. WINTER Template 01 Are you ready to learn?

2. 02 IMPULSE AND IMPULSIVE FORCE

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5. 05 DEMONSTRATION

6. WINTER Template 06 DESIGN AN EXPERIMENT What can we do to investigate the impulsive force? Materials: Eggs Newspapers Sponges

8. RESULT & OBSERVATION 08 Surface types Contact time Observation on egg Force Table Longer / Shorter Break / Did not break Larger / Smaller Sponge Longer / Shorter Break / Did not break Larger / Smaller

9. Relationship between force and change in momentum 09 Before After Is the egg experience any changes in momentum?

11. WINTER Template 11 CONCLUSION -The contact time on impact is affected by the hardness of surface. The harder the surface, the shorter the contact time on impact -When contact time is shortest, the force of impact will be larger -The force is directly proportional to the change in momentum

13. Example: A bullet of mass 50 g is shot and it travels at a velocity of 100 m/s towards a target and takes 0.01 seconds to come to a stop. What is the impulsive force hitting the target?

16. APPLICATION OF IMPULSIVE FORCE 13 Both cars travel at a velocity of 120 m/s and hits a wall. Why does the impact on car A is smaller compared to car B? A B

20. What are other applications of impulsive force in our daily lives? Can you explain?? 15

21. WINTER Template 16 Do you want to play some games? INSTRUCTIONS: -You are allowed to discuss during the game -The task for each player is to calculate the questions given -Given that initial velocity of the ball is 0 ms -1 and mass of the ball is 2 kg . The result of the calculation will determine whether it’s a goal or a miss

22. 17 Kick no. Final velocity (v) Time of impact (t/s) Impulsive force (F/N) Result of the kick 1 45 0.3 300 GOAL / MISSED 2 25 0.2 250 GOAL / MISSED 3 30 0.6 100 GOAL / MISSED 4 30 0.2 300 GOAL / MISSED 5 30 0.6 100 GOAL / MISSED 6 10 0.8 25 GOAL / MISSED Initial velocity (u) = 0 m/s Mass of ball (m) = 2kg