A 1000 kg car is moving with speed 30m/s .After application of brake car stops after travelling 50m .Calculate work done by braking force.
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pratik29121:
which book question
I don't know
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its ok
who take name
the handwriting is atleast understandable unlike some people
If you will see my handwriting , u will become fan of it .
stop complaining
oh chat on other questions
not this
Answered by
5
Given
Mass=1000kg
Initial velocity (u) =30m/s
Final velocity (v) =0
Displacement(s) =50m
Force acting =???
Now as we know F=MA
And 2as=v²-u²
2xax50=0²-30²
a=-30²/100=-900/100=-9m/s²
F=ma
F=1000000x-9=-9000000N
- show opposite reaction.
Work done =force x change in position
=-9000000x50
=450x10^6j
Mass=1000kg
Initial velocity (u) =30m/s
Final velocity (v) =0
Displacement(s) =50m
Force acting =???
Now as we know F=MA
And 2as=v²-u²
2xax50=0²-30²
a=-30²/100=-900/100=-9m/s²
F=ma
F=1000000x-9=-9000000N
- show opposite reaction.
Work done =force x change in position
=-9000000x50
=450x10^6j
we want to find work done
u solve half
I didn't see that at that time
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