Answered

Looking for reliable answers? Westonci.ca is the ultimate Q&A platform where experts share their knowledge on various topics. Experience the ease of finding quick and accurate answers to your questions from professionals on our platform. Get detailed and accurate answers to your questions from a dedicated community of experts on our Q&A platform.

What is the KE of a 4500kg at a speed of 20 m/s?

Sagot :

TwinklingStar

[tex] \\ \maltese \: \: \: \: \large{\underline{\underline{\pmb{ \textbf{\textsf{\color{purple}{Given \: :}}}}}} } \\ \\ [/tex]

  • Mass ( m ) of the body = 4,500 kg
  • velocity of the body = 20 m/s

[tex] \\ \maltese \: \: \: \: \large{\underline{\underline{\pmb{ \textbf{\textsf{\color{green}{To \: Find \: :}}}}}} } \\ \\ [/tex]

  • kinetic energy (ke) = ??

[tex] \\ \maltese \: \: \: \: \large{\underline{\underline{\pmb{ \textbf{\textsf{\color{aqua}{Solution \: :}}}}}} } \\ \\ [/tex]

★ Calculating the kinetic energy;

[tex] \\ \maltese \: \: \: \: \large{\underline{\underline{\pmb{ \textbf{\textsf{\color{hotpink}{using \: formula \: :}}}}}} } \\ \\ [/tex]

[tex] \red\bigstar { \underline{ \underline{\underline{\boxed{\color{blue}{\sf{ \:Kinetic \: \: energy \: = \frac{1}{2} \: \: m \: v \: {}^{2} }}}}}} }\\ \\ [/tex]

Where ,

  • (Ke) = kinetic energy.
  • m = mass
  • v = velocity

[tex] \\\\\sf \implies \: \:Kinetic \: \: energy \: = \frac{1}{2} \: \: m \: v \: {}^{2} \\ [/tex]

[tex] \\\sf \implies \: \:Kinetic \: \: energy \: = \frac{1}{2} \: \times \: 4,500 \: \times \: { 20}^{2} \\ [/tex]

[tex] \\\sf \implies \: \:Kinetic \: \: energy \: = \frac{1}{2} \: \times \: 4,500 \: \times \: 400\\[/tex]

[tex] \\\sf \implies \: \:Kinetic \: \: energy \: = \frac{1}{ \cancel{2}} \: \times \: \cancel {4,500 }\: \times \: 400\\[/tex]

[tex]\\ \sf \implies \: \:Kinetic \: \: energy \: = 2,250 \: \times \: 400\\[/tex]

[tex] \\\bf \implies{ \pink{ \: \:Kinetic \: \: energy \: = 9,00,000 \: \: \: joules}}\\\\\\[/tex]

hence the kinetic energy (ke) is 9,00,000 Joules...!!

Hi1315

Answer:

900kJ

Explanation:

The formula to find the kinetic energy is :

[tex]E_k=\frac{1}{2} mv^{2}[/tex]

Here,

m ⇒ mass ⇒ 4500 kg

v ⇒ velocity ⇒ 20 m/s

Let us find it now.

[tex]E_k=\frac{1}{2} mv^{2}[/tex]

[tex]E_k=\frac{1}{2} *4500*20^{2}[/tex]

[tex]E_k=\frac{1}{2} *1800000[/tex]

[tex]E_k=900000J[/tex]

[tex]E_k=900kJ[/tex]

We hope this information was helpful. Feel free to return anytime for more answers to your questions and concerns. We appreciate your visit. Our platform is always here to offer accurate and reliable answers. Return anytime. Keep exploring Westonci.ca for more insightful answers to your questions. We're here to help.