A girl weighing 400 N climbs a vertical ladder. If the value of g be 10 m/s2, the work done by her after climbing 2 m will be:

a) 200 J

b) 800 J

c) 8000 J

d) 2000 J

Answer:

The correct answer is **b)** 800 J

"hey kids welcome to lido q a video
i am vinit your lido tutor glad to bring
you this question on your screen
a girl weighing 400 newton climbs a
vertical leather
ladder if the value of g be 10 meter per
second square
the work done by her after climbing 2
meter will be
now work done
will be equal to mgh that will be
400
okay sorry now the weight is given to
you
not the mass right
so weight is mass into gravitational
force
this implies 400 by 10 is equal to mass
this implies mass is equal to 40 kg
therefore work done is equal to
40 into 10 into 2
that is equal to 800 joules
right guys in that easy if you still
have it out please leave a comment below
do like the video and subscribe to our
channel i'll see you in our next video
until then bye guys keep practicing keep
learning"

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