Question

please give me ans ???​

Answer 1

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Answer 2

Given:

Energy spent by man, E= 6.4 KJ= 6400J

Displacement of body, s= 64 m

Time taken,t= 2.5 s

To Find:

Force applied by man

Solution:

We know that,

• Expression of energy E is given by

$\purple{\underline{\boxed{\bf{E=F.s}}}}$

where,

F is force applied

s is displacement

$\rule{190}{1}$

Let the force applied on body be F

So,

$\longrightarrow\rm{E=F.s}$

$\longrightarrow\rm{6400=F\times 64}$

$\longrightarrow\rm{64F=6400}$

$\longrightarrow\rm{F=\dfrac{6400}{64}}$

$\longrightarrow\rm{F=100\ N}$

Hence, force applied by man on body is 100 N.