A driver of a car traveling at 15.0 m/s applies the brakes, causing a uniform acceleration of -2.0 m/s/s. How long does it take the car to come to a stop? Use the GUESS method. Please help me asap.
a - Acceleration V₀ - Final Velocity V₁ - Initial Velocity t - Time
Given: a = -2.0 m/s² V₁ = 15.0 m/s V₀ = 0 m/s ; because the car stopped
Find: t = ?
Solution:
a = [V₀⁻V₁]÷t
First, we should derive the formula to the element that we are looking for (which is time).
t = [V₀⁻V₁]÷a t = [0 m/s - 15.0 m/s]÷(-2.0 m/s²) ; substituting the numbers t = -15.0 m/s ÷ -2.0m/s² t = 7.5 seconds ; cancelling the removable units thus resulting only to the time unit s(seconds)
