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3 cards from this section. Quick, good the night before a test.
Define momentum.
Think about what factors affect how fast something is moving.
What is the difference between elastic and inelastic collisions?
Consider whether energy is conserved in each case.
What does momentum depend on?
Think of the factors influencing how fast an object moves.
In an elastic collision, is kinetic energy conserved?
Recall the characteristics of elastic collisions.
Two balls of masses 3 kg and 5 kg collide elastically, with the 3 kg ball moving at 4 m/s and the lighter ball at rest. Find their velocities after collision.
Set up simultaneous equations using p1i = p1f + p2f and K1i + K2i = K1f + K2f.
A car (mass = 800 kg) collides inelastically with a stationary truck (mass = 1200 kg). If the car's speed before collision is 15 m/s, what is their common speed after collision?
Remember that conservation of momentum must hold.
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