Projectile motion has _acceleration at each point of the trajectory.
Correct answer: B. Constant
- A. Variable
- B. Constant
- C. Zero
- D. None of these
Explanation
Option B is correct since 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 ms-2, 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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