Physics-(general)
NEET Physics (general) MCQ Question
Type: MCQ-numerical-Hard-Class 11
A ball is thrown vertically upwards with an initial velocity of 20 m/s from a height of 25 m. Calculate the total time taken by the ball to reach the ground. (Take g = 10 m/s²)
A
5 s
B
5.0 s
C
6.0 s
D
7.0 s
Correct Answer
Option B
Detailed Explanation
Using the equation y = y0 + v0t + (1/2)at² with y0 = 25 m, v0 = 20 m/s, a = -10 m/s², and solving for t gives the quadratic equation 5t² - 20t - 25 = 0. Solving this gives t = 5 s.
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