Work Power Energy Question 1
Question 1 - 24 January - Shift 1
A spherical body of mass $2 kg$ starting from rest acquires a kinetic energy of $10000 J$ at the end of $5^{\text{th }}$ second. The force acted on the body is $N$.
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Answer: (40)
Solution:
Formula: Kinetic Energy
$\frac{1}{2} \times 2 \times v^{2}=10000$
$\Rightarrow v^{2}=10000$
$\Rightarrow v=100 m / s$
$\Rightarrow v=at=a \times 5=100$
$\Rightarrow a=20 m / s^{2}$
$ F=ma=2 \times 20=40 N $
