Which of the following is NOT an example of accelerated motion?
Correct answer: D. Horizontal component of projectile motion
- A. Vertical component of projectile motion
- B. A swinging pendulum
- C. Circular motion at constant speed
- D. Horizontal component of projectile motion
Explanation
The correct answer is the horizontal component of projectile motion. This component maintains a constant velocity as there are no external forces like air resistance or gravity acting horizontally in ideal conditions. Thus, it is not accelerated.In contrast, the vertical component of projectile motion is accelerated due to the force of gravity, which changes its velocity over time. A swinging pendulum is constantly accelerating as it changes speed and direction under the influence of gravity. Circular motion, even at a constant speed, involves centripetal acceleration due to its continuous change in direction.
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About Force and Motion
Displacement, velocity and acceleration describe motion, including the horizontal and vertical components of projectile motion. The chapter connects these quantities with Newton's laws, momentum and impulse, then applies conservation of momentum to collisions, distinguishing elastic collisions from inelastic ones.
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