Question

A car starts from rest and accelerates at the rate of 5 m/s². find its velocity after 15 seconds.

Answer 1

Answer:

ᴠ = ᴜ + ᴀᴛ

ᴠ = 0ᴍ/s + 5ᴍ/s^2*15s

ᴠ = 75ᴍ/s

ⒽⓄⓅⒺ ⒾⓉ ⒽⒺⓁⓅⓈ

Answer 2

Given:

• Acceleration,a = 5 m/s²

• Time taken,t = 15 seconds

• Initial velocity,u = 0 m/s

To be calculated:

Calculate the final velocity of car?

Formula used:

v = u + at

Solution:

By using first equation of motion ,

v = u + at

★ Substituting the values in the above formula,we get

v = 0 + 5 × 15

v = 0 + 75

v = 75 m/s

Thus,the final velocity of car is 75 metres per seconds.

Knowledge Enhancer:

Graphical representation of motion :

• Distance time graph

• Velocity time graph

• Acceleration time graph