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Horizontal Projectile Motion Quiz

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In the horizontal projectile experiment, comparing the trajectories of the Red Ball (Projectile) and Blue Ball (Free Fall), what do you observe about their vertical motion?

Horizontal Projectile Motion Quiz - Quiz Questions

Test your understanding of projectile motion, composition and decomposition of motion, and related physical laws.

1. In the horizontal projectile experiment, comparing the trajectories of the Red Ball (Projectile) and Blue Ball (Free Fall), what do you observe about their vertical motion?

A. The Red Ball falls faster than the Blue Ball
B. The Blue Ball falls faster than the Red Ball
C. Their vertical heights are always the same at any given moment
D. There is no relationship between their vertical heights

2. Which statement correctly describes the horizontal component of projectile motion?

A. It is uniformly accelerated rectilinear motion
B. It is uniform rectilinear motion
C. It is variable acceleration rectilinear motion
D. It decelerates gradually due to gravity

3. If the height ($h$) of a projectile is increased by 4 times while keeping the initial velocity constant, how does the flight time ($t$) change?

A. 2 times
B. 4 times
C. Unchanged
D. 1.414 times

4. If only the horizontal initial velocity ($v_0$) of a projectile is increased, which quantity will change?

A. Flight time
B. Vertical velocity at impact
C. Horizontal range
D. Gravitational potential energy at impact

5. A ball is thrown horizontally with an initial velocity $v_0 = 5.0\text{m/s}$ from a height of $h = 5.0\text{m}$. What is its approximate horizontal range $x$? (Take $g = 9.8\text{m/s}^2$)

A. 5.05 m
B. 1.01 m
C. 10.2 m
D. 25.0 m

6. What is the acceleration of the ball throughout the projectile motion?

A. Both magnitude and direction change with time
B. Constant magnitude, direction always vertically downward
C. Constant magnitude, direction always along the tangent of the trajectory
D. Zero horizontal acceleration, increasing vertical acceleration

7. Which statement about the velocity vector of projectile motion is correct?

A. Velocity magnitude remains constant
B. Velocity direction remains constant
C. Velocity magnitude at impact equals initial horizontal velocity
D. The horizontal component of velocity remains constant

8. When should an airplane drop supplies to accurately hit a ground target?

A. When the plane is directly above the target
B. After the plane has passed the target
C. At some moment before reaching the target
D. Any time, depending on altitude

9. In this experiment, if the Red Ball is replaced by a heavier iron ball (ignoring air resistance) with same height and initial speed, will the trajectory change?

A. Yes, flight time will decrease
B. Yes, horizontal range will increase
C. No, the trajectory will be identical
D. Yes, fall speed will increase

10. Why do we use "stroboscopic" images or trajectory displays in the experiment?

A. To make the visual look better
B. To record positions at equal time intervals for analysis
C. To increase the difficulty of the experiment
D. To see the color of the object clearly