A particle of mass 3kg moving along a straight line under the action of a...
FURTHER MATHEMATICS
WAEC 2022
A particle of mass 3kg moving along a straight line under the action of a F N, covers a line distance, d, at time, t, such that d = t\(^2\) + 3t. Find the magnitude of F at time t.
- A. 0N
- B. 2N
- C. 3(2t + 3)N
- D. 6N
Correct Answer: D. 6N
Explanation
F = m * a
d = t\(^2\) + 3t.
a = \(\frac{d^2d}{dt^2}\)
\(\frac{d[d]}{dt}\) = 2t + 3
\(\frac{d^2d}{dt^2}\) = 2m/s\(^2\)
a = 2m/s\(^2\)
F = m * a
F = 3 × 2 = 6N
Post an Explanation Or Report an Error
If you see any wrong question or answer, please leave a comment below and we'll take a look. If you doubt why the selected answer is correct or need additional more details? Please drop a comment or Contact us directly. Your email address will not be published. Required fields are marked *