Question

A car starts from rest and accelerates to 3m/s² in 1 minute,calculate its final velocity
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Answer 1

Given :

Initial velocity of the car = zero.

Acceleration of the car = 3m/s².

Time taken = 1 min = 60 sec.

To find :

The final velocity of the car.

Solution :

Velocity is the rate of displacement of a moving object over time.

• Velocity is vector quantity having both magnitude and direction.
• SI unit of velocity is metre per second.

As we are provided with initial velocity, acceleration and time taken we can use first equation of kenimatics that is,

v = u + at

where,

• v denotes final velocity
• u denotes initial velocity
• a denotes acceleration
• t denotes time taken

substituting the given values,

➛ v = u + at

➛ v = 0 + (3)(60)

➛ v = (3)(60)

➛ v = 180m/s$.$

thus, the final velocity of the car is 280m/s.

Answer 2

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• Velocity = u + at

Substituting the values,

=> v = u + at

=> v = 0 + (3)(60)

=> v = (3)(60)

=> v = 180m/sec Ans.