2022 Easy
Single Choice
Marks: 4.00 / −1.00
A particle starts from rest and accelerates uniformly at \( a = 4\,\text{m/s}^2 \). What is its velocity after \( t = 3\,\text{s} \)?
- A. \( 12\,\text{m/s} \)
- B. \( 7\,\text{m/s} \)
- C. \( 4\,\text{m/s} \)
- D. \( 16\,\text{m/s} \)
Correct Option:
- A. \( 12\,\text{m/s} \) ✓ Correct
- B. \( 7\,\text{m/s} \)
- C. \( 4\,\text{m/s} \)
- D. \( 16\,\text{m/s} \)
Hint: Use \( v = u + at \) with \( u = 0 \).
Solution:
\( v = 0 + 4 \times 3 = 12\,\text{m/s} \)
kinematics