Question

A car of mass 1000 kg starts from rest and attain the velocity of 10m/s in 5s. Calculate the work done by normal reaction of the car

Answer 1

M is 1000kg
u is 0
v is 10m/s
t is 5second

to find the work we need to find the force so by using first equation of motion V= U + AT
We can find acceleration
10 = 0 + a5
a=2m/s^2


AND NOW
FORCE = ma
F=1000×2
F=2000N


and now by using second equation of motion we can find distance

s=ut + 1/2at^2
s=o×5 + 1/2 ×2×5×5
s=25 m


now work is W= FS


W= 2000× 25
100000JOULE
OR 100KJ

Answer 2

Answer:

Explanation:

M is 1000kg

u is 0

v is 10m/s

t is 5second

to find the work we need to find the force so by using first equation of motion V= U + AT

We can find acceleration

10 = 0 + a5

a=2m/s^2

So

FORCE = ma

F=1000×2

F=2000N

and now by second equation of motion we can fin

d distance

s=ut + 1/2at^2

s=o×5 + 1/2 ×2×5×5

s=25 m

now work is W= FS

W= 2000× 25

100000JOULE

OR 100KJ