AP Physics 1easymcq1 pt
A 0.5 kg ball is thrown straight upward with an initial speed of 10 m/s. What is the maximum height reached by the ball?
A.1.25 m
B.5.1 m
C.10 m
D.20 m
Explanation
Core Concept
Using conservation of mechanical energy: initial kinetic energy = final potential energy. ½mv₀² = mgh. The mass cancels out, giving h = v₀²/(2g) = (10 m/s)²/(2 × 9.8 m/s²) = 100/19.6 ≈ 5.1 m. Option A would be correct if the initial speed was 5 m/s. Option C would be correct if the initial speed was about 14 m/s. Option D would be correct if the initial speed was about 20 m/s.
Correct Answer
B5.1 m
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