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Physics - W.E.P. Question with Solution | TestHub

PhysicsW.E.P.MiscellaneousMedium2 minQB

PhysicsMediumnumerical

A spherical body of mass $2 kg$ starting from rest acquires a kinetic energy of $10000 J$ at the end of $5^{th}$ second. The force acted on the body is _____ $N$ .

Answer:

40.00

Solution:

Given kinetic energy, $\frac{1}{2} m v^{2} = 10000 J$

$\Rightarrow \frac{1}{2} \times 2 \times v^{2} = 10000$

$\Rightarrow v^{2} = 10000$

$\Rightarrow v = 100 m s^{- 1}$

Also,

$\Rightarrow v = at = a \times 5 = 100$

$\Rightarrow a = 20 m s^{- 2}$

Therefore, force acting

$F = m a = 2 \times 20 = 40 N$

Stream:JEESubject:PhysicsTopic:W.E.P.Subtopic:Miscellaneous

⏱ 2mℹ️ Source: QB

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