Question

a bicycle is moving with velocity of 20 m/s. if brake is applied to decrease it’s velocity to 10 m/s in 2 seconds, find its acceleration

Answer 1

Answer:

-5 m/s²

Explanation:

Given :

• Initial velocity = u = 20 m/s

• Final velocity = v = 10 m/s

• Time taken = t = 2 seconds

To find :

• Acceleration of the bicycle

Acceleration = (final velocity - Initial velocity) / time

Acceleration = (10-20)/2

Acceleration = - 10/2

Acceleration = - 5 m/s²

The acceleration of the bicycle is equal to -5 m/s²

More :

• First equation of motion = v=u+at

• Second equation of motion = s = ut+½at²

• Third equation of motion = v²-u²=2as

Answer 2

Answer:

Given:

→ A bicycle is moving with velocity of 20 m/s. If brake is applied to decrease it’s velocity to 10 m/s in 2 seconds.

Find:

→ Find its acceleration.

Using formula:

→ Acceleration = Final velocity - Initial velocity/Time.

Calculations:

• Let "A" be acceleration.

→ A = 10 - 20/2

→ A = -10/2

→ A = -5 m/s²

Therefore, -5 m/s² is the acceleration.