Question

Q11.A body of mass 60 kg moving with a speed of 20 km/h.Find it's Kinetic
Energy.​

Answer 1

Answer:

Heya!!!

Explanation:

Here is your answer

Given :

Mass (m) = 60 kg

Speed (v) = 20km/h = 50/9 m/s  = 5.55 m/s

To find : Kinetic energy (K.E.)

Solution :

K.E. = 1/2mv²

K.E. = 1/2*60*(5.55)²

K.E. = 30*30.8

K.E. = 924 kg m/s or Joule

So, the kinetic energy of a body having mass 60 kg moving with speed of 20km/h  will be 924 Joule.

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Answer 2

Solution :-

Given :-

• Mass → 60 kg
• Velocity → 20 km/hr → 5.56 m/s

To Find :-

• Kinetic Energy (K.E)

Formula Used :-

• $\underline{ \boxed{ \pink{ \bf K. E=\dfrac{1}{2} m \: v^{2}}}}$

Subsituting Values

$\sf \implies \cancel{ \dfrac{1}{2} \times 60} \times(5.56)^{2}$

$\sf \implies 30 \times 5.56 \times 5.56$

$\sf \implies 30 \times 30.9136$

$\sf \implies 927.40500$

Thus, the Kinetic Energy is 927.405 Joule

Hence, Solved ♡