Objects launched at an angle

Answer Key - Grade 11 Science Worksheet - Challenge Me

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

1. 1.

   A spring toy launches a ball from level ground with a horizontal part of 4 m/s and a vertical part of 7.35 m/s. With no air, how far away does it land, Bo?

   6 m
2. 2.

   A spring toy launches a ball from level ground with a horizontal part of 2.5 m/s and a vertical part of 14.7 m/s. With no air, how far away does it land, Esme?

   7.5 m
4. 3.

   In the trajectory grid, what are the ball's velocity parts at 1 s, Jun?

   • 2.5 m/s across, 14.7 m/s up
   • 2.5 m/s across, 4.9 m/s up
   • 2.5 m/s across, 9.8 m/s down
   • 0 across, 4.9 m/s up
5. 4.

   In the trajectory grid, what is the vertical part of the velocity at 2.5 s, Luz?

   Use the picture in question 3.

   • 24.5 m/s downward
   • 0 m/s
   • 9.8 m/s upward
   • 9.8 m/s downward
6. 5.

   Milo says a launched ball is completely stopped at the top of its arc. Agree or disagree?

   • Agree: the whole flight takes the time to the top
   • Agree: steeper launches go farther
   • Agree: both parts of its motion stop
   • Disagree: it still moves sideways
7. 6.

   Noah says the steeper the launch, the farther the ball lands. Agree or disagree?

   • Agree: the vertical part is v cos θ
   • Disagree: 45° lands farthest
   • Agree: a steeper launch lands farther
   • Agree: at the top it stops
8. 7.

   Pia says a ball's whole flight takes twice as long as reaching the top, on level ground with no air. Agree or disagree?

   • Disagree: steeper launches fall faster
   • Agree: up and down take equal times
   • Disagree: the flight equals the time to the top
   • Disagree: the horizontal part is v sin θ
9. 8.

   A ball with a horizontal part of 3 m/s must land 6 m away on level ground. What vertical part does it need, Ren?

   • 4.9 m/s
   • 2 m/s
   • 9.8 m/s
   • 19.6 m/s
10. 9.

    To double a ball's time in the air, what should Tala double?

    • The ball's mass
    • The range
    • The horizontal part of the launch
    • The vertical part of the launch
11. 10.

    A 45° launch on level ground has its speed doubled. With no air, what happens to its range, Zee?

    • It doubles
    • It stays the same
    • It becomes 4 times as far
    • It halves