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:

accleration = 20-10/2

=5m/s^2

Answer 2

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​

So we have :

• InitiaI veIocity (u) = 20 m/s
• FinaI veIocity (v) = 10 m/s
• Time (t) = 2 s

And we need to find acceIeration (a).

So we wiII soIve it using 1st equation of motion :

⇔ v = u + at

PIugging aII vaIues in equation :

⇒ 10 = 20 + a × 2

⇒ 10 - 20 = 2a

⇒ -10 = 2a

⇒ a = -10/2

⇒ a = -5 m/s²

Therefore,

AcceIeration of bicycIe = - 5 m/s²

Equations of motion :

1. v = u + at
2. s = ut + 1/2 at²
3. v² - u² = 2as