Asked Dec 28, 2019
  • Identify the force and explain whether work is being performed in the following cases.
  1. You lift a pencil off the top of a desk.
  2. A spring is compressed to half its normal length.

Expert Answer

Step 1

a). For the case of lifting off the pencil, force in applied against the gravity and ...

Want to see the full answer?

See Solution

Check out a sample Q&A here.

Want to see this answer and more?

Solutions are written by subject experts who are available 24/7. Questions are typically answered within 1 hour.*

See Solution
*Response times may vary by subject and question.
Tagged in

Work,Power and Energy

Related Physics Q&A

Find answers to questions asked by student like you
Show more Q&A

Q: Gas in a container is at a pressure of 1.5 atm and a volume of 4.0 m3. What is the work done on the ...

A: (a). the work done of the gas is


Q: When x - rays of wavelength of 0.129 nm are incident on the surface of a crystal having a structure ...

A: Given that the wavelength of x ray is 0.129 nm, first - order maximum is observed at 8.15°.


Q: A 2.65 - kg power line running between two towers has a length of 38.0 m and is under a tension of 1...

A: (a). The speed of wave in a stretched string is


Q: If the spring shown in Figure CQ13.3 is compressed rather than stretched so that x = -x0, determine ...

A: Part A:


Q: A dolphin located in seawater at a temperature of 25°C emits a sound directed toward the bottom of t...

A: Formula for the distance of the dolphin is,


Q: How could you use spotlights at a play to change the performer's clothes suddenly from yellow to bla...

A: By changing the spotlight color to blue; we can change the performers clothes from yellow to black. ...


Q: In the photoelectric effect, explain why the stopping potential depends on the frequency of the ligh...

A: Stopping potential is defined as the minimum potential necessary to stop any electron from reaching ...


Q: In one cycle a heat engine absorbs 500 J from a high-temperature reservoir and expels 300 J to a low...

A: Click to see the answer


Q: In what region of electromagnetic spectrum is the resonant frequency of electrons in glass?

A: Vibrating electric fields and magnetic fields together creates electromagnetic waves.