Question

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"​

Answer 1

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.