2.2.2 Independence of projectile motion Quiz: Pearson Edexcel Physics, Unit 2

The 20 questions

1. Ignoring air resistance, what happens to the horizontal velocity of a projectile?

   • Decreases to zero
   • Remains constant
   • Increases steadily
   • Accelerates downwards

2. Ignoring air resistance, what is the vertical acceleration of a projectile near Earth?

   • Increasing downwards
   • Constant upwards
   • Constant downwards
   • Zero

3. Ball A is dropped and Ball B is launched horizontally from the same height. Which lands first?

   • Both land together
   • Ball B
   • Heavier ball
   • Ball A

4. A ball is launched horizontally at 10 m s^-1 from a cliff 20 m high (g = 10 m s^-2). How long does it take to reach the ground?

   • 0.5 s
   • 2 s
   • 1 s
   • 4 s

5. Using the same launch (10 m s^-1 horizontally, 2 s to land), what is the horizontal distance travelled?

   • 20 m
   • 200 m
   • 40 m
   • 10 m

6. A projectile is launched at 20 m s^-1 at 30 degrees above the horizontal. What is its horizontal velocity component?

   • 34.6 m s^-1
   • 17.3 m s^-1
   • 10.0 m s^-1
   • 20 m s^-1

7. For the same projectile (20 m s^-1 at 30 degrees), what is the vertical component of the launch velocity?

   • 17.3 m s^-1 upwards
   • 20 m s^-1 upwards
   • 10 m s^-1 upwards
   • 5.0 m s^-1 upwards

8. The vertical launch component is 10 m s^-1 upwards with g = 10 m s^-2. How long does the projectile take to reach its maximum height?

   • 1.0 s
   • 2.0 s
   • 0.5 s
   • 1.7 s

9. For symmetrical projectile motion, how does total flight time compare to time to maximum height?

   • Quadruple
   • Twice as long
   • Half as long
   • Equal

10. A ball rolls off a table at 2 m s^-1 horizontally from a height of 0.8 m, with g = 10 m s^-2. How long does it take to hit the floor?

    • 0.4 s
    • 0.16 s
    • 0.2 s
    • 0.8 s

11. For the table ball in the previous question (2 m s^-1 horizontal, 0.4 s in the air), what horizontal distance does it travel before landing?

    • 0.4 m
    • 0.8 m
    • 1.6 m
    • 0.2 m

12. A projectile lands at launch height. How does final vertical velocity compare to initial vertical velocity?

    • Zero
    • Equal and same
    • Equal and opposite
    • Double magnitude

13. A projectile is launched at 45 degrees. If its launch speed is doubled, by what factor does its range change?

    • sqrt(2) times
    • 1/2 times
    • 4 times
    • 2 times

14. Why can horizontal and vertical motions of a projectile be analysed independently?

    • Constant speed
    • Changing mass
    • Horizontal gravity only
    • Vertical gravity only

15. A ball is thrown horizontally at 15 m s^-1 from a height of 45 m (g = 10 m s^-2). What is its horizontal distance from the launch point when it lands?

    • 30 m
    • 15 m
    • 45 m
    • 135 m

16. Which quantity is common to both the horizontal and vertical analysis of a projectile?

    • Time
    • Horizontal velocity
    • Mass
    • Vertical acceleration

17. A projectile is launched at a speed of 25 m s^-1 at an angle with sin = 0.8 and cos = 0.6. What is the horizontal component of velocity?

    • 10 m s^-1
    • 20 m s^-1
    • 25 m s^-1
    • 15 m s^-1

18. Ignoring air resistance, a projectile launched at 30 degrees has the same range as one launched at which other angle with the same speed?

    • 60 degrees
    • 45 degrees
    • 15 degrees
    • 90 degrees

19. A stone is thrown horizontally at 5 m s^-1 from a height of 5 m (g = 10 m s^-2). How long does it take to reach the ground?

    • 5 s
    • 2 s
    • 0.5 s
    • 1 s

20. Ignoring air resistance, which factor has no effect on time of flight for a horizontal launch?

    • Drop distance
    • Horizontal launch speed
    • Initial height
    • Gravitational acceleration

Related quizzes

• Equations for uniformly accelerated motion Quiz · 2.1.1 · 20 questions
• Displacement, velocity and acceleration graphs Quiz · 2.1.2 · 20 questions
• Scalars, vectors and resolving and adding vectors Quiz · 2.2.1 · 20 questions
• Free-body diagrams and Newton's first and second laws Quiz · 2.3.1 · 20 questions
• Weight, gravitational field strength and terminal velocity Quiz · 2.3.2 · 20 questions
• Newton's third law and momentum Quiz · 2.4.1 · 20 questions
• Conservation of linear momentum in one dimension Quiz · 2.4.2 · 20 questions
• Moments, centre of gravity and the principle of moments Quiz · 2.5.1 · 20 questions
• Work and kinetic energy Quiz · 2.6.1 · 20 questions
• Gravitational potential energy and conservation of energy Quiz · 2.6.2 · 20 questions