Question

calculate the force required to impart to a car of velocity 30m/s in 10sec starting from rest the mass of the car is 1500kg
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Answer 1

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When a car starts from the rest, its initial velocity is 0 and here its moving velocity is mentioned to be 30m/s.

So the difference in these two velocities is 30 – 0 = 30 m/s.

Hence, the acceleration of the car is calculated as this difference in velocities / time,

means here it is 30 / 10 = 3. 

The formula for finding the force is acceleration x mass, i.e. 1500 x 3 = 4500 Newton. 

Answer 2

Answer:

Explanation:

Solution :-

Given :-

Initial Velocity, u = 0 (since the car starts from rest)

Final Velocity, v = 30 m/s

Time, t = 10 seconds

Mass, m = 1500 kg

To Calculate :-

Force, F = ??

Formula to be used :-

F = ma

Putting all the values, we get

F = m(v - u)/t

Substituting the values of m, v, u and t, we get

F = m(v - u)/t

F = 1500(30 - 0)/10

F = 1500 × 30/10

F = 4500 N.

Hence, the force required to impart to a car is 4500 N.