Ignoring air resistance, a projectile has zero horizontal acceleration and a vertical acceleration of g, so this Year 13 sheet opens with the two fixed accelerations of projectile motion. The trajectory is a parabola and the answers record zero and constant as further results.
Key Takeaways
Horizontal acceleration of a projectile is zero (Q1).
Vertical acceleration of a projectile is g (Q2).
Q3 records the path as a parabola.
Section A: Multiple Choice Questions (1 Mark Each)
Choose the correct option for each question.
1.Ignoring air resistance, the horizontal acceleration of a projectile is
(a) zero(b) g(c) 10 m/s²(d) increasing
2.The vertical acceleration of a projectile is
(a) g(b) zero(c) half of g(d) negative infinity
3.Ignoring air resistance, the path of a projectile is
(a) a parabola(b) a straight line(c) a circle(d) a sine wave
4.At the highest point of its flight, the vertical velocity of a projectile is
(a) zero(b) maximum(c) g(d) half the initial velocity
5.The time of flight of a projectile depends on
(a) the vertical motion(b) the horizontal velocity only(c) the mass(d) the shape of the object
6.Ignoring air resistance, the horizontal velocity of a projectile is
(a) constant(b) increasing(c) decreasing(d) zero
Section B: Short Answer Type Questions (2 Marks Each)
Show all steps clearly.
7.State the horizontal acceleration of a projectile, ignoring air resistance.
8.State the vertical acceleration of a projectile.
9.What shape is the path of a projectile?
10.What is the vertical velocity at the highest point of a projectile's flight?
11.What two components make up the velocity of a projectile?
12.What does the horizontal velocity of a projectile depend on?
13.Write the suvat formula for the vertical displacement.
14.How can you find the time of flight of a projectile?
Section C: Numericals & Word Problems (3 Marks Each)
Apply the concepts to solve the problems. Show all working.
15.A projectile is launched horizontally at 10 m/s. Ignoring air resistance, what is its horizontal velocity after 3 s?
16.A ball is dropped from rest. Using v = gt with g = 10 m/s², find its velocity after 2 s.
17.A ball is thrown vertically upwards at 20 m/s. Using t = v ÷ g with g = 10 m/s², find the time taken to reach the top of its flight.
18.A ball is thrown horizontally from a height of 20 m. Using t = √(2h ÷ g) with g = 10 m/s², find the time taken to reach the ground.
19.A projectile is launched horizontally at 30 m/s from a height of 5 m. Using t = √(2h ÷ g) with g = 10 m/s², find the time of flight.
20.A ball thrown horizontally at 20 m/s is in the air for 2 s. Using distance = speed × time, find the horizontal range.
Answer Key
1. a) zero
2. a) g
3. a) a parabola
4. a) zero
5. a) the vertical motion
6. a) constant
7. Refer to solution guide.
8. Refer to solution guide.
9. Refer to solution guide.
10. Refer to solution guide.
11. Refer to solution guide.
12. Refer to solution guide.
13. Refer to solution guide.
14. Refer to solution guide.
15. Refer to solution guide.
16. Refer to solution guide.
17. Refer to solution guide.
18. Refer to solution guide.
19. Refer to solution guide.
20. Refer to solution guide.
End of Worksheet
People Also Ask
What is the horizontal acceleration of a projectile?
Zero, option (a) in this worksheet (Q1).
What is the vertical acceleration of a projectile?
g, option (a) in this worksheet (Q2).
What path does a projectile follow?
A parabola, option (a) in this worksheet (Q3).
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