A car of mass 1200 kg traveling westward at 30. m/s is slowed to a stop in a distance of 50. m by the car’s brakes. What is the acceleration of the car? acceleration = (final velocity squared - initial velocity squared) / (2 times the displacement)

Question

A car of mass 1200 kg traveling westward at 30. m/s is slowed to a stop in a distance of 50. m by the car’s brakes.  What is the acceleration of the car? acceleration = (final velocity squared - initial velocity squared) / (2 times the displacement)

anonymous · Answer

I don't understand how i find the displacement and isnt the final and initial velocity 30 and 50?

mayankdevnani · Answer

use 3 equation of motion :-
$$\large \bf v^2=u^2+2as$$
where,
v=0,
u=30 m/s
s=50 m
a=? (you have to calculate)

Plug all the values in this equation and get your answer :)

mayankdevnani · Answer

hope you understand. @dar2015