The velocity V of a projectile can be found by the expression:
Correct answer: B. Option B: v = gt
- A. Option A: v = Vx + Vy
- B. Option B: v = gt
- C. Option C: v = (Vx^2 + Vy^2)^0.5
- D. Option D: v = gt + Vx
Explanation
The correct answer is Option B: v = gt. In projectile motion, the vertical component of velocity is influenced by gravity (g) over time (t), which is represented by this equation. The other options either combine horizontal and vertical components incorrectly or calculate the total velocity without considering the individual components.
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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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