Q.→ a car changes its velocity from 20 m/s to 25m/s over 4 second. what is the force produced by the engine if the car has a mass of 1100 kg. "only smart people can solve this question"
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Answer:-
Given:
Initial Velocity (u) = 20 m/s
Final Velocity (v) = 25 m/s
Time (t) = 4 s.
Mass of the car (m) = 1100 kg.
We know that,
Force (F) = Mass * acceleration.
Acceleration (a) = (v - u) / t
→ a = (25 - 20) / 4
→ a = 5/4 m/s²
Hence,
Force applied (F) = 1100 * 5/4
→ F = 1375 N
Therefore, the force applied by the engine is 1375 N.
Additional Information :
Force:
- It is the push or pull of an Object.
- It is a vector quantity [ has both direction and magnitude. ]
- Force = mass * acceleration
- It's S.I unit is Newton (N) and C.G.S unit is dyne (dyn).
- 1 N = 10⁵ dyn.
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