A ball is thrown vertically upward with a speed of . What maximum height does it reach (in m)? (take )
Answer and explanation
Correct answer: D. 125
- Step 1: At maximum height during vertical motion under gravity, instantaneous velocity is zero ().
- Step 2: Apply the kinematic relation .
- Step 3: Substitute initial speed and acceleration due to gravity : .
Answer
125.
Why not the others: 250 evaluates (forgets factor of 2 in denominator); 5 evaluates ascent time ; 100 doubles the initial velocity.
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