Share
Felipe drives his car at a velocity of 28 m/s. He applies the brake, which slows the vehicle down at a rate of 6.4 m/s2 and causes it to slo
Question
Felipe drives his car at a velocity of 28 m/s. He applies the brake, which slows the vehicle down at a rate of 6.4 m/s2 and causes it to slow to a stop. How long does it take for the car to stop? Round your answer to the nearest tenth.
in progress
0
Physics
3 years
2021-07-25T12:56:40+00:00
2021-07-25T12:56:40+00:00 2 Answers
3 views
0
Answers ( )
Answer:
4.4
Explanation:
i got it correct
Answer:
4.4 seconds
Explanation:
use the equation
v(final)=v(initial)+a(t)
what we know:
v(initial)=28mps
v(final)=0 because it comes to a stop
a= -6.4 it is negative because the 6.4 is resisting forward motion
using these you get
0= 28 + (-6.4)t
6.4(t)=28
t=4.375 sec
and with rounding
t=4.4 sec