For projectile motion, in the absence of air resistance:
Correct answer: A. Horizontal acceleration is zero
- A. Horizontal acceleration is zero
- B. Vertical acceleration is zero
- C. Horizontal force is constant
- D. Vertical speed is constant
Explanation
Air resistance acts on horizontal component, mainly. In the absence of air resistance, there will be no horizontal acceleration. Vertical acceleration is due to gravity, hence options B and D are wrong. In the absence of air resistance, no horizontal force will be applied and thus, option C is wrong.
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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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