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NDA 2025
Exam
NDA
Year
2025
Subject
General Ability
Chapter
General Science

NDA 2025 · General Ability · General Science

A car has an initial velocity of 12 m/s and is brought to rest over...

A car has an initial velocity of 12 m/s and is brought to rest over a distance of 45 m. The acceleration of the car is

Options

  1. A+1.6+1.6 m/s²
  2. B+3.2+3.2 m/s²
  3. C−1.6-1.6 m/s²
  4. D−0.8-0.8 m/s²

Correct answer

C. −1.6-1.6 m/s²

Step-by-step solution

Given initial velocity u=12u = 12 m/s.

Final velocity v=0v = 0 m/s.

Distance covered s=45s = 45 m.

Using the third equation of motion:

v2=u2+2asv^2 = u^2 + 2as

Substituting the given values:

0=(12)2+2a(45)0 = (12)^2 + 2a(45)

0=144+90a0 = 144 + 90a

90a=−14490a = -144

a=−14490a = -\dfrac{144}{90}

a=−1.6a = -1.6 m/s²<br><br>Answer:<br><br>Answer:-1.6m/s2m/s²
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