Question

A car starts from rest and experiences a constant acceleration of 5 m/s2 until it reaches a speed of 650 meters

per second. How long does this process take?
What’s the unknown variable?
1. Final velocity
2. Distance
3. Acceleration
4. Initial velocity
5. Time

Answer 1

Answer: Time.

Step-by-step explanation:

Hey there!!!

The reason is,

According to the question we have,

Initial velocity = 0m/s { as it starts from rest}.

Final velocity = 650 m/s

acceleration = 5m/s^2.

Looking on this formula,

`a = (v - u)/(t)`

Where "v" represents final velocity, "u" represents initial velocity and "a" represents acceleration. We dont have is time "t".

So, it's obvious that tine is an unknown variable.

Hope it helps...