Momentum and impulse

Answer Key - Grade 11 Science Worksheet - Building Confidence

Circle the best answer, or write your answer on the line.

1. 1.

   What is the momentum of a 4 kg object moving at 2.5 m/s, Bo?

   10 kg·m/s
2. 2.

   What is the momentum of a 0.15 kg object moving at 20 m/s, Esme?

   3 kg·m/s
4. 3.

   In the momentum bar chart, which cart has more momentum, Jun?

   • They are equal
   • Cart A
   • Cart B, since it is faster
5. 4.

   In the momentum bar chart, where does cart A's 6 kg·m/s come from, Kira?

   Use the picture in question 3.

   • 3 m/s × 3 s
   • 2 kg + 3 m/s + 1
   • 2 kg × 3 m/s
6. 5.

   Which has more momentum: a 1 kg cart at 10 m/s, or a 5 kg cart at 1 m/s, Milo?

   • The 1 kg cart
   • The 5 kg cart, since it is heavier
   • They are equal
7. 6.

   How do the momenta of a 3 kg cart at 2 m/s and a 1 kg cart at 6 m/s compare, Noah?

   • The 1 kg cart's is bigger, since it is faster
   • They are equal
   • The 3 kg cart's is bigger
8. 7.

   What is the momentum of a 5 kg cart parked on a track, Pia?

   • 49 kg·m/s, its weight
   • 0 kg·m/s
   • 5 kg·m/s, its mass
9. 8.

   The same cart is stopped by a foam bumper or by a wooden block. Which gives the smaller average force, Ren?

   • They are the same
   • The wooden block
   • The foam bumper
10. 9.

    What does an impulse do to an object, Tala?

    • Changes its mass
    • Keeps its momentum fixed
    • Changes its momentum
11. 10.

    A foam pad lets a rolling ball take longer to stop. What does that do to the force on the ball, Zee?

    • It lowers it
    • It has no effect
    • It raises it