A motorcycle is being driven at a speed of 20 m/s when brakes are applied to bring it to rest in five seconds. The deceleration produced in this case will be:

a) +4 \mathrm{m/s^2}

b) -4 \mathrm{m/s^2}

c) +0.25 \mathrm{m/s^2}

d) -0.25 \mathrm{m/s^2}

Answer:

The correct answer is **a)** +4 \mathrm{m/s^2}

"hey kids welcome to lido q a video
i am vinit your leader tutor bringing
this question
on your screen a motorcycle motorcycle
is being driven at a speed of 20 meter
per second when breaks are applied to
bring it to rest
in five seconds the de-acceleration
decks produced in this case will be
now what do you understand by
de-acceleration
deacceleration in this case is the time
taken
deacceleration is the process
of
coming to a complete
hot right now
time taken is equal to
5 seconds right
what was the speed the speed was 20
meter per second
yes therefore to come from 20 meter
to 0
right zero meter per second
what is the de-acceleration uh
speed or the de-acceleration so
therefore
the acceleration is from 20 meter per
second to
0 meter per second right
therefore the acceleration
is given by speed by
time or the initial speed by time
this will be equal to 20 by
5 which is equal to 4 meter per
second square isn't that easy guys
right so if you still have a doubt
please leave a comment below
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our channel i'll see you in our next
video
until then bye kids keep learning"

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