In projectile motion the
Correct answer: B. Acceleration is vertical, while the velocity can be in any direction.
- A. Acceleration is parallel (or antiparllel)to the velocity.
- B. Acceleration is vertical, while the velocity can be in any direction.
- C. Acceleration is prependicular to the velocity.
- D. Acceleration is vertical and the velocity is horizontal.
Explanation
The horizontal velocity of a projectile is constant (a never changing in value). There is a vertical acceleration caused by gravity; its value is 9.8 m/s/s, down. The vertical velocity of a projectile changes by 9.8 m/s each second.
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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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