Question

A car starts from rest and has uniform
acceleration of 2m/s squ. .Find the speed of the car after 5 seconds​

Answer 1

Given :

• Initial velocity = 0 m/s
• Acceleration = 2 m/s²
• Time = 5 s

To find :

• Speed of the car after 5 seconds

Knowledge required :-

→ First equation of motion -

• v = u + at

→ Third equation of motion -

• v² - u² = 2as

where,

• v = Final velocity
• u = Initial velocity
• a = Acceleration
• s = speed

Solution :

Firstly, we will find the final velocity using the first equation of motion.

⠀⠀⠀⇒ v = u + at

⠀⠀⠀⇒ v = 0 + (2 × 5)

⠀⠀⠀⇒ v = 0 + 10

⠀⠀⠀⇒ v = 10

• Final velocity of the car = 10 m/s

★ Speed of the car after 5 seconds = 10 m/s

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Know MorE :-

Velocity -

• It is distance travelled by a body in one second in a particular direction.
• It is a vector quantity.
• Its S.I. unit is m/s.

Acceleration -

• It is the rate of change of velocity of a body.
• It is vector quantity.
• Its S.I. unit is m/s²

Displacement -

• It is the distance travelled by an object in a particular direction.
• It is a vector quantity.
• Its S.I. unit is m.