Question

Starting from7m/s car acquires a velocity of 15m/s in 4s .Calculate the Acceleration of Car.If Mass of Car is 7kg Find Force acting on it.

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Answer 1

Given :-

Starting from7m/s car acquires a velocity of 15m/s in 4s .Calculate the Acceleration of Car.If Mass of Car is 7kg

To Find :-

Force acting

Solution :-

We know that

◼ F i n d i n g  A c c e l e r a t i o n : -

a = (v - u)/t

a = (15 - 7)/4

a = 8/4

a = 2 m/s²

◼ F i n d i n g  F o r c e : -

F = ma

F = 7 × 2

F = 14 N

Answer 2

Given:

• Initial velocity (u) = 7m/s
• Final velocity (v) = 15m/s
• Time taken (t) = 4s
• Mass (m) = 7Kg

To find:

• Force (F)

Solution:

Acceleration :

• Change in velocity/Time taken

⇒ (v - u)/t

⇒ (15 - 7)/4

⇒ 8/4

⇒ 2 m/s²

Force :

• Mass × Acceleration

⇒ 7 × 2

⇒ 14 N

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