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3) Calculate the kinetic energy of a 7 kg mass traveling at a velocity of 4 m/sec.
Formula
Work with Units
Answer with Units

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DᴀʀᴋPᴀʀᴀᴅᴏx

[tex]▪▪▪▪▪▪▪▪▪▪▪▪▪  {\huge\mathfrak{Answer}}▪▪▪▪▪▪▪▪▪▪▪▪▪▪[/tex]

Let's solve ~

Given terms :

  • Mass (m) = 7 kg

  • velocity (v)= 4 m/s

The formula to find kinetic Energy is ~

[tex] \boxed{ \boxed{ \sf{ \frac{1}{2} m{v}^{2} }}} [/tex]

Now, apply the formula according to given situation

[tex]{ \qquad{ \sf{ \dashrightarrow}}}  \:  \: \sf \: \dfrac{1}{2} \times 7 \times ( {4)}^{2} [/tex]

[tex]{ \qquad{ \sf{ \dashrightarrow}}}  \:  \: \sf \: \dfrac{1}{2} \times 7 \times 16[/tex]

[tex]{ \qquad{ \sf{ \dashrightarrow}}}  \:  \: \sf \:7 \times 8[/tex]

[tex]{ \qquad{ \sf{ \dashrightarrow}}}  \:  \: \sf \:56 \: \: joules[/tex]

Therefore, the kinetic Energy of the car is 56 joules

Hi1315

Answer:

56 J

Explanation:

Formula to find the kinetic energy is :

[tex]E_k[/tex] = [tex]\frac{1}{2} [/tex]  × m × v²

Here ,

m ⇒ mass

v ⇒  velocity

Let us solve now

 [tex]E_k[/tex] = [tex]\frac{1}{2} [/tex] × m × v²

     = [tex]\frac{1}{2} [/tex] × 7 kg × ( 4 ms⁻¹ )²

     = [tex]\frac{1}{2} [/tex] × 7 × 16

     = [tex]\frac{1}{2} [/tex] × 112

     = 56 J

Hope this helps you :-)

Let me know if you have any other questions :-)

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