## 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.