Question

a body starts from rest and moves with uniform acceleration of 4m/s² until it travels a distance of 800m,find the velocity​

Answer 1

80 m/s

Step-by-step explanation:

Given:

i) initial velocity (as starts from rest) = 0 m/s

ii) acceleration: 4 m/s²

iii) distance travelled: 800 m

Formula required:

(final velocity)² - (initial velocity)² = 2 × acceleration × distance

Now solve:

v² - 0² = 2 × 4 × 800

v² = 6400

v = √6400

v = 80 m/s