Mechanics #1 Free Response Question Solutions - AP Physics C 1998 Released Exam

The video tutorial covers the first mechanics free response question from the AP Physics C 1998 exam. It includes calculating average speeds of gliders, sketching velocity graphs for carts A and B, and explaining the conservation of momentum during a collision. The tutorial also discusses the elastic nature of the collision and analyzes the kinetic energy curve, highlighting the conservation of mechanical energy.

What is the mass of glider A?

• 1.20 kg

• 0.75 kg

• 0.90 kg

• 0.60 kg

What is the initial velocity of glider B?

• 1 m/s

• 0 m/s

• 0.5 m/s

• 2 m/s

How is the average speed of an object calculated?

• Distance multiplied by time

• Distance divided by time

• Time divided by distance

• Velocity multiplied by time

What is the average speed of glider A from 0.10 to 0.30 seconds?

• 0.5 m/s

• 1 m/s

• 1.5 m/s

• 2 m/s

During which time interval does glider A have a constant velocity of 1 m/s?

• 0 to 0.70 seconds

• 0.10 to 0.30 seconds

• 0.70 to 1.30 seconds

• 1.30 to 2.00 seconds

What happens to glider A's velocity during the interval from 0.70 to 1.30 seconds?

• It remains constant

• It increases

• It becomes zero

• It decreases

What principle is used to determine the velocity of glider B after the collision?

• Conservation of mass

• Conservation of energy

• Conservation of momentum

• Newton's second law

What is the final velocity of glider B after the collision?

• 0.6 m/s

• 0.9 m/s

• 1.2 m/s

• 1.5 m/s

What indicates that the collision is elastic?

• Momentum is not conserved

• Objects stick together

• Kinetic energy is lost

• Kinetic energy is conserved

Why is there a minimum in the kinetic energy curve at t = 1.00 seconds?

• Minimum velocity

• Maximum kinetic energy

• Maximum elastic potential energy

• Minimum momentum