Rate of Deceleration & Time Required

Thread starter dgsigala
Start date Sep 12, 2013
Tags

Deceleration Rate Time

AI Thread Summary

To determine the rate of deceleration and time required for a truck slowing from 40.0 m/s to 20.0 m/s over 100 m, the equations of motion are applied. The relevant formulas include s = ut + 1/2 at² and v² = u² + 2as. By substituting the known values into these equations, the deceleration can be calculated. The discussion emphasizes using these kinematic equations rather than the initial deceleration formula. Ultimately, the solution involves calculating both the deceleration rate and the time taken for the truck to cover the distance.

Sep 12, 2013

dgsigala

Homework Statement

A truck traveling at 40.0 m/s decelerates uniformly to 20.0 m/s over a distance of 100 m. Determine the rate of deceleration and the time required for the truck to travel the 100 m.

Homework Equations

Deceleration=(original velocity-final velocity)/Time

The Attempt at a Solution

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Sep 13, 2013

Basic_Physics

Rather try and use
s=ut + \frac{1}{2}at²
or
v²=\!\:u²+2as

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