Answer to Question #276535 in Physics for ashton

Question #276535

A crane moved a 160kg hot tub from the ground to the rooftop of a hotel 54 m above the ground. If the crane used 180, 000 joules of energy, how efficient was the crane?

Expert's answer

"\\eta=\\frac{160(9.8)(54)}{180000}=0.47"

Learn more about our help with Assignments: Physics

Comments

No comments. Be the first!

Leave a comment

Related Questions

1. list down 3 sports/events that utilizes the concept of Torque and briefly explain how this concept i
2. the sum of the potential differences across the components in a series circuit is equal to the total
3. a) Define elasticity of a matter.b) Define stress and strain. Explain different types of stress and
4. Find the moment of inertia of adisc of radius 0.4m and mass 0.75 kg.
5. Table 2.5 shows how the velocity of a car changed during part of a journey along a main road. (a) Dr
6. If 12𝑁 force is applied to a fluid of cross-section 5.34 𝑐𝑚2 with a shearing rate of 0.7 �
7. If 12𝑁 force is applied to a fluid of cross-section 5.34 𝑐𝑚2 with a shearing rate of0.7 �