Lakhmir Singh Solutions Class 9 Physics Solutions for Exercise in Chapter 2 - Force and Laws of Motion
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A girl weighing 25 kg stands on the floor. She exerts a downward force of 250N on the floor. What force does the floor exert on her?
Answer:
The force exerted by the girl downward = 250N = force exerted by the floor According to the third law of motion, every actin as an equal and opposite reaction.
a = F/m
Video transcript
"kids welcome to lido q a video
i am vinit your leader tutor glad to
bring you this question on your screen
a girl weighing 25 kg stands on the
floor
c exerts a downward force of 20 to 50
newton
on the flow what force does the
floor exert on her
now if you
recall newton's third law of force
newton's third law of motion
what does it say
do you remember so according to
newton's third law of motion
every action has an equal and opposite
reaction right
equal and opposite
reaction
now by this law whatever force
the girl is exerting on on on the
downward direction
the same force will be exerted by the
wall or the flow
right in the opposite direction
therefore force
exerted
by the
floor will be equal to 250 newton in
upward direction
right so that's the answer guys
so if you still have a doubt 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 learning
"
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