Free fall

Answer Key - Grade 11 Science Worksheet

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

1. 1.

   A ball is dropped from rest from a hovering drone. Using d = ½gt² with g = 9.8 m/s², how far does it fall in 0.8 s, Ari?

   3.136 m
2. 2.

   A ball is dropped from rest from a hovering drone. Using d = ½gt² with g = 9.8 m/s², how far does it fall in 2.5 s, Esme?

   30.625 m

3. Read this first

   Ball dropped from a hovering drone (computed values)

   time (s)	speed (m/s)	distance fallen (m)
   0	0	0
   1	9.8	4.9
   2	19.6	19.6
   3	29.4	44.1

4. 3.

   In the drop table, how does the speed change each second, Jun?

   • It grows by 9.8 m/s
   • It grows by 4.9 m/s
   • It stays the same
   • It doubles
5. 4.

   In the drop table, when the time doubles from 1 s to 2 s, what happens to the distance fallen, Kira?

   • It becomes four times as far
   • It grows by 4.9 m
   • It doubles
   • It stays the same
6. 5.

   Using the drop table's pattern, how far would the ball fall in 4 s, Luz?

   • 58.8 m
   • 49 m
   • 39.2 m
   • 78.4 m
7. 6.

   A spring toy launches a ball straight up at 19.6 m/s. How long until it reaches the top, Milo?

   • 19.6 s
   • 4 s
   • 0.5 s
   • 2 s
8. 7.

   A spring toy launches a ball straight up at 19.6 m/s. How high does it rise, Noah?

   • 2 m
   • 19.6 m
   • 9.8 m
   • 39.2 m
9. 8.

   Up is positive. The same ball falls back to its launch height. What is its velocity then, Pia?

   • +19.6 m/s
   • −9.8 m/s
   • 0 m/s
   • −19.6 m/s
10. 9.

    A flat sheet of paper floats down while the same sheet, crumpled, drops fast. Why, Ren?

    • Air slows the flat sheet much more
    • The crumpled ball has a bigger g
    • Flat paper has no weight
    • Crumpling makes the paper heavier
11. 10.

    A coin and a feather are dropped together inside a tube with the air pumped out. Which lands first, Tala?

    • They land together
    • The coin, since it is heavier
    • Neither falls without air
    • The feather