High School

Dear beloved readers, welcome to our website! We hope your visit here brings you valuable insights and meaningful inspiration. Thank you for taking the time to stop by and explore the content we've prepared for you.
------------------------------------------------ If \( 196 \times 10^2 \) J of energy is used to raise a 20 kg boy above the ground, how high would he be raised?

A. 10 m
B. 20 m
C. 30 m
D. 40 m

Answer :

Final answer:

A 20 kg boy would be raised 20 meters above the ground when 196 x 10^2 J of energy is used. The calculation involves using the formula for potential energy and rearranging it to solve for height. The correct answer is option (b) 20 m.

Explanation:

The height the boy would be raised is 20 meters (b).

To calculate this, we use the formula: Potential Energy = Mass x Gravity x Height. Given that Potential Energy = 196 x 10^2 J, and Mass = 20 kg, we can find the height by rearranging the formula to Height = Potential Energy / (Mass x Gravity). Substituting the values, Height = 196 x 10^2 J / (20 kg x 9.8 m/s^2) = 20 meters.