Worksheet 3.3 - Projectiles Concepts
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1) vo = 25 m/s; initial height = 0 m; angle of inclination = 90o
Describe what happens to the velocity of the ball during its flight. (1 mark)
In which direction does the ball accelerate on its way up? (1 mark)
In which direction does the ball accelerate on its way down? (1 mark)
What can you say about the ball’s velocity at the top of its arc? (1 mark)
2) vo = 25 m/s; initial height = 50 m; angle of inclination = 0o
Draw the projectile’s trajectory. Draw the ball’s position at t = 0, 1, 2 and 3 s. (3 marks)
Set another projectile at the same height
but with a vo = 0 m/s. Compare the
amount of time it takes to hit the ground
with this projectile. Explain why this
occurs. (2 marks)
Draw the resultant velocity as well as vx and vy at each interval. (3 marks)
Describe what happens to
a) the x component of the projectile’s velocity. (1 mark)
b) the y component of the projectile’s velocity (1 mark)
What is the ball’s acceleration in the y-direction? (1 mark)
The x-direction? (1 mark)
3) vo = 15 m/s; initial height: 0 m; angle of inclination = 60o
Draw the projectile’s trajectory. Draw the ball at the start, before, at and after its peak. (3 marks)
Draw the resultant velocity as well as vx and vy at each interval. (3 marks)
On the same diagram draw the trajectory of a ball with
vo = 15 m/s; angle of inclination = 30o (1 mark)
Explain why two projectiles shot at the same speed at complimentary angles (add to 90o) will travel the same
distance. (2 marks)