Exam Questions

• Explain the decrease in intensity as light travels through the glass block (3 marks)

  Some light is reflected at the top of edge aswell as the glass block absorbs the brightness.
• Explains what happens to acceleration during the first few seconds as the force remains constant (3 marks)

  Acceleration increases because as it increases mass is decreasing due to the rocket using fuel
• Explain how momentum is conserved in collisions (6 marks)

  Momentum = Mass x Velocity

  Change in Momentum of Q =— Change in Momentum of R

  Time of collisions are equal

  R accelerates because of force from Q

  No overall change in momentum