Physics-Uniform & Non-uniform Motion
NEET Physics Uniform & Non-uniform Motion MCQ Question
Type: MCQ-numerical-Easy-Class 11
A ball is thrown vertically upwards with an initial velocity of 20 m/s from the top of a building of height 45 m. If the acceleration due to gravity is -10 m/s², how long will it take for the ball to reach the ground?
A
5 seconds
B
6 seconds
C
7 seconds
D
8 seconds
Correct Answer
Option A
Detailed Explanation
Using the equation y = y₀ + v₀t + 0.5at², with y₀ = 45 m, y = 0 m, v₀ = 20 m/s, and a = -10 m/s², we find that t = 5 s as shown in the NCERT context.
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