Physics-(general)
NEET Physics (general) MCQ Question
Type: MCQ-numerical-Medium-Class 11
A constant retarding force of 50 N is applied to a body of mass 20 kg moving initially with a speed of 15 m/s. How long does the body take to stop?
A
4 seconds
B
6 seconds
C
8 seconds
D
10 seconds
Correct Answer
Option B
Detailed Explanation
Using the equation of motion v = u + at, where final velocity v = 0, initial velocity u = 15 m/s, and acceleration a = F/m = -50/20 = -2.5 m/s², we solve for time t: 0 = 15 - 2.5t, giving t = 6 seconds.
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