Question

2.)

A Formula One car is a single-seat racing car with an open cockpit and substantial wings located in the front and rear. At high speeds, the aerodynamics of the car help to create a strong downward force which allows the car to brake from 27.8 m/s (100 km/hr or 62.2 mi/hr) to 0 m/s in as small of a distance as 17 meters. Determine the deceleration rate (i.e., acceleration) achieved by such a car.

Answer 1

`-22.7 m/s^2`

Step-by-step explanation:

This is a uniformly accelerated motion, so we can determine the deceleration of the car by using a suvat equation:

`v^2-u^2=2as`

where

v is the final velocity

u is the initial velocity

a is the acceleration

s is the distance covered

For the car in this problem,

u = 27.8 m/s

v = 0

s = 17 m

Solving for a, we find the acceleration:

`a=(v^2-u^2)/(2s)=(0-27.8^2)/(2(17))=-22.7 m/s^2`