Question

Calculate the force required to impart to a car velocity of 60m/s in 20 seconds, starting from rest. The mass of the car is 1500 kg.​

Answer 1

=> Force = 4500 N

Explanation:

• Initial Velocity(u) = 0 m/s

• Final Velocity(v) = 60 m/s

• Time Taken(t) = 20 sec

• Mass(m) = 1500 kg

• Acceleration(a) = ?

• Force = ?

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First Let's Calculate The Accleration :-

$= > \bf \color {red}{a = \frac{v - u}{t} } \\ = > a = \frac{60 - 0}{20} \\ = > a = \frac{60}{20} \\ = > \boxed{a = 3}$

Thus The Accleration is 3 m/s^2

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Now Let's Calculate The Force :-

=> Force = m × a

=> 1500 × 3

=> 4500 N