1. What is the vertical velocity of a horizontally launched projectile at its starting point?
Answer:
Explanation:
A horizontally launched projectile has no vertical velocity component at the starting point.
2. Which factor affects the horizontal range of a projectile?
Answer:
Explanation:
All these factors can influence the horizontal range of a projectile.
3. How does the horizontal velocity of a projectile change during its flight (ignoring air resistance)?
Answer:
Explanation:
In the absence of air resistance, the horizontal component of velocity remains unchanged.
4. At what point is the vertical velocity of a horizontally launched projectile the greatest?
Answer:
Explanation:
Vertical velocity increases due to gravitational acceleration and is maximum just before impact.
5. The time of flight for a horizontally launched projectile depends on:
Answer:
Explanation:
Time of flight depends on how long the projectile takes to fall vertically under gravity.
6. What is the shape of the trajectory of a horizontally launched projectile?
Answer:
Explanation:
The projectile follows a parabolic path in horizontal projectile motion.
7. At the highest point of its trajectory, a projectile has:
Answer:
Explanation:
Vertical velocity becomes zero at the highest point, but the horizontal velocity remains unchanged.
8. For a projectile launched horizontally, which component of velocity changes uniformly with time?
Answer:
Explanation:
The vertical component of velocity changes uniformly due to gravity.
9. The range of a projectile launched horizontally is maximum for which angle of projection?
Answer:
Explanation:
For horizontal launches, the projection angle is 0°.
10. If the horizontal range of a projectile is R and maximum height is H, the time of flight is proportional to:
Answer:
Explanation:
Time of flight is proportional to the square root of the maximum height.
11. The horizontal range of two projectiles is the same. If one is projected horizontally, the other is projected at:
Answer:
Explanation:
The other one is projected vertically upward.
12. In the absence of air resistance, the horizontal component of a projectile's velocity is:
Answer:
Explanation:
Horizontal velocity remains constant since no horizontal force acts on it.
13. If a ball is thrown horizontally with a speed 'v' from a height 'h', then its speed when it hits the ground is:
Answer:
Explanation:
Using Pythagoras theorem for vertical and horizontal components of velocity.
14. The time taken to reach the maximum height is _______ the time taken to come back to the same level for a horizontally projected projectile.
Answer:
Explanation:
Time taken to rise to maximum height is the same as the time taken to descend.
15. If the gravitational force were to become zero, then a horizontally projected object would:
Answer:
Explanation:
Without gravity, there would be no downward force on the object, and it would continue in its initial horizontal direction.