Question

Usain Bolt, the world famous sprinter, of
mass 94 kg completes a 100 m race in 9.6 s.
Calculate his kinetic energy,
please solve I need help no one can fraud me plese​

Answer 1

Given data : Usain Bolt, the world famous sprinter, of mass 94 kg completes a 100 m race in 9.6 s.

To find : Kinetic energy of Usain Bolt ?

Solution : Now, according to given,

⟹ Mass of Usain Bolt = 94 kg

⟹ Displacemet of Usain Bolt = 100 m

⟹ Time taken by Usain Bolt = 9.6 sec

Usain Bolt completes a 100 m race in 9.6 sec.

Now, by formula of velocity :

⟹ velocity = displacemet/time

⟹ velocity = 100/9.6 m/s

Now, by formula of kinetic energy :

⟹ K.E. = ½ * m * v²

⟹ K.E. = ½ * 94 * (100/9.6)²

⟹ K.E. = ½ * 94 * 10000/92.16

⟹ K.E. = 47 * 10000/92.16

⟹ K.E. = 47 * 108.5069444

⟹ K.E. = 5099.826389 joule

Answer : Kinetic energy of Usain Bolt is 5099.826389 joule { or 5100 joule }.

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Answer 2

Answer:

Given data : Usain Bolt, the world famous sprinter, of mass 94 kg completes a 100 m race in 9.6 s.

To find : Kinetic energy of Usain Bolt ?

Solution : Now, according to given,

⟹ Mass of Usain Bolt = 94 kg

⟹ Displacemet of Usain Bolt = 100 m

⟹ Time taken by Usain Bolt = 9.6 sec

Usain Bolt completes a 100 m race in 9.6 sec.

Now, by formula of velocity :

⟹ velocity = displacemet/time

⟹ velocity = 100/9.6 m/s

Now, by formula of kinetic energy :

⟹ K.E. = ½ * m * v²

⟹ K.E. = ½ * 94 * (100/9.6)²

⟹ K.E. = ½ * 94 * 10000/92.16

⟹ K.E. = 47 * 10000/92.16

⟹ K.E. = 47 * 108.5069444

⟹ K.E. = 5099.826389 joule

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