3. 2.1.1 What is inertia? 2.1.2 Relation between inertia and mass 2.1.3 Situation involving inertia 2.1.4 Ways to reduce negative effects of inertia
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9. Safety belt Prevent driver from thrown forward due to inertia. Safety Airbag To prevent the driver from hitting the steering wheel or dashboard during a collision.
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11. m 1 =0.02 kg v 2 = 2ms -1 m 2 = 1000 kg m 1 = 1000 kg v 2 = 80 ms -1 v 1 = 100 ms -1 v 1 = 2ms -1 m 2 = 0.05 kg
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13. Principle of conservation of momentum states that in the absence of an external force, the total momentum of a system remains unchanged . PRINCIPLE OF CONSERVATION OF MOMENTUM
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16. ELASTIC COLLISION INELASTIC COLLISION Both objects move independently at their respective velocities after the collision. The two objects combine and move together with a common velocity after the collision. Momentum is conserved Momentum is conserved.
17. ELASTIC COLLISION Total Momentum Before = Total momentum After m 1 u 1 + m 2 u 2 = m 1 v 1 + m 2 v 2
19. EXPLOSIONS Before explosion both object stick together and at rest After collision , both object move at opposite direction .
20. EXPLOSION Total Momentum Before collision= Total Momentum After collision 0 = m 1 v 1 + m 2 v 2 m 1 v 1 = - m 2 v 2 negative sign means opposite direction
