Advanced Physics: Momentum & Energy Assessment

In a perfectly elastic collision between two objects, which fundamental laws must BOTH be satisfied?

• Conservation of momentum and conservation of kinetic energy
• Conservation of momentum and Newton's third law
• Conservation of mass and conservation of energy
• Conservation of force and conservation of velocity

A 4 kg ball moving at 6 m/s collides with a stationary 2 kg ball. After an elastic collision, why can't both balls move in the same direction at the same speed?

• It would violate conservation of momentum
• It would violate conservation of kinetic energy
• It would violate both conservation laws
• It would violate Newton's third law

What happens to the total kinetic energy in a system during a perfectly inelastic collision?

• It increases
• It stays exactly the same
• It decreases as some energy converts to heat and sound
• It is completely converted to potential energy

Why does a bowling ball have more momentum than a ping pong ball moving at the same velocity?

• The bowling ball has greater mass
• The bowling ball has more kinetic energy
• The bowling ball experiences more friction
• The bowling ball has greater acceleration

If you triple the velocity of an object, by what factor does its kinetic energy increase?

• 3 times
• 6 times
• 9 times
• 27 times

Which scenario would result in the greatest change in momentum?

• A 1 kg object changing velocity from 5 m/s to 10 m/s
• A 2 kg object changing velocity from 0 m/s to 3 m/s
• A 3 kg object changing velocity from 2 m/s to 4 m/s
• A 4 kg object changing velocity from 1 m/s to 2 m/s

In a completely inelastic collision, what must be true about the objects after the collision?

• They must stop moving completely
• They must move at the same velocity
• They must bounce off each other
• They must move in opposite directions

How does mass affect an object's momentum compared to its kinetic energy?

• Momentum increases linearly with mass, kinetic energy increases linearly with mass
• Momentum increases linearly with mass, kinetic energy doesn't depend on mass
• Momentum increases quadratically with mass, kinetic energy increases linearly with mass

Which has more kinetic energy: a 2 kg object moving at 4 m/s or a 1 kg object moving at 6 m/s?

• The 2 kg object
• The 1 kg object
• They have equal kinetic energy
• Cannot be determined without more information

Why do cars have crumple zones designed to collapse during collisions?

• To increase the collision time and reduce force
• To make repairs easier
• To make the car lighter
• To improve aerodynamics