Question

What is the final velocity of an object that starts from rest and accelerates uniformly at 4

m/s2 over a distance of 8 m?

Answer 1

8m/s

Step-by-step explanation:

Given parameters:

Initial velocity = 0m/s

Acceleration = 4m/s²

Distance = 8m

Unknown:

Final velocity = ?

Solution:

To solve this problem, we use the right motion equation and find the unknown.

The right motion equation to solve this problem is given as :

v² = u² + 2aS

v is the final velocity

u is the initial velocity

a is the unknown acceleration

S is the distance

Now insert the parameters and solve;

v² = 0² + 2 (4) (8)

v² = 64

v = 8m/s