Springs and pendulums

Answer Key - Grade 11 Science Worksheet - Building Confidence

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

1. 1.

   A spring with a spring constant of 200 N/m is stretched 5 cm. How much force does it pull back with, Ari?

   10 N
2. 2.

   A spring with a spring constant of 50 N/m is stretched 12 cm. How much force does it pull back with, Bo?

   6 N
3. 3.

   A spring with a spring constant of 400 N/m is stretched 3 cm. How much force does it pull back with, Esme?

   12 N
5. 4.

   In the wave diagram, what is the bob's amplitude, Jun?

   • 10 cm
   • 20 cm, from top to bottom
   • 2 cm
6. 5.

   In the wave diagram, what is the pendulum's period, Kira?

   Use the picture in question 4.

   • 1 s, from one side to the other
   • 4 s, the whole trace
   • 2 s
7. 6.

   In the wave diagram, where is the bob moving fastest, Luz?

   Use the picture in question 4.

   • At the peaks, 10 cm out
   • Where the trace crosses 0 cm
   • It moves at one steady speed
8. 7.

   Spring A has k = 100 N/m and spring B has k = 400 N/m. Which is stiffer, Noah?

   • Spring A
   • They are equally stiff
   • Spring B
9. 8.

   Two pendulums have equal strings, but one bob is twice as heavy. How do their periods compare, Ren?

   • The heavier one swings slower
   • They are the same
   • The lighter one swings slower
10. 9.

    Which change makes a pendulum swing more slowly, Tala?

    • A longer string
    • A shorter string
    • A heavier bob
11. 10.

    A bigger mass is hung on the same spring. What happens to its bounce, Zee?

    • Nothing changes
    • It bounces faster
    • It bounces more slowly