If the power rating on a motor is 10W and 500J of energy is used to move a 20N object, how long is the motor used for?

Answers

Answer 1

Answer:

The power rating on the motor is the maximum power it's ABLE to deliver. It can run with LESS power output than the rating, but if you try to run it with MORE than it's rated, the motor will overheat and eventually burn out.

" 10 watts " means " 10 Joules of enrgy per second ".

If the motor is operated at its full maximum rated capacity, then

(500 joules) / (10 joules/sec) = 50 seconds

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1)A cyclist travels ¾ of a circular track from A to b as shown in figure. The radius of the circular track is 400 m. Calculate the displacement and distance travelled by the cyclist.PLEASE SHOW ALONG WITH STEPS(1) 2)Two objects having their masses 3:5 are acted upon by two forces.The forces are in the ration of 5:3. find the ration in their accelerations. PLEASE SHOW ALONG WITH STEPS (2) 3) A man pushes a box of mass 50 kg with a force of 80 N. What will be the acceleration of the box due to the force? what would be the acceleration if the mass were doubled? PLEASE SHOW ALONG WITH STEPS(3) 4) How does the force of gravitation between two objects change when the distance between them is reduced to half. PLEASE SHOW ALONG WITH STEPS (4) 5) Explain what happens to the force between two objects if: A) the mass of one object is doubled? B) the distance between the object is tripled. PLEASE SHOW ALONG WITH STEPS (5) 6)How will the equations of motion for an object moving with a uniform velocity change? PLEASE SHOW ALONG WITH STEPS (6) 7)The force of attraction between two bodies is 20N. Calculate the force between them when mass of each body as well as the distance between them are halved. PLEASE SHOW ALONG WITH STEPS(7)

Explain how we were able to boil water at room temperature

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Answer:

put water at room temperature into a vacuum chamber and begin removing the air. Eventually, the boiling temperature will fall below the water temperature and boiling will begin without heating.

You can see yourself in the mirror because?

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Mirrors reflect light waves.

The reason your able to see yourself in mirror is because it's a reflective surface and light comes and reflects of a reflective surface, it's not just because somethings shiny.

Will a seismic wave traveling through a solid go slower or faster than a seismic wave traveling through a liquid? Why?

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You can't answer this question because you aren't giving the specific type of seismic waves. There is an s-wave a p-wave and an l-wave. Those are the basic waves. An S-wave cannot travel through a liquid at all. So, obviously it travels slower than any other seismic wave.

It would travel faster because their speed depends on the density and composition of material that they pass through.

Compare and contrast static, sliding, and rolling friction.

Answers

Static friction - the friction that occurs when a force is being applied on a still object.

Sliding friction - the friction that occurs upon a moving object; it is always lower than the static friction of the same object.

Rolling friction - the friction on a rolling object; it is actually a form of static friction with the contact point of the wheel with the surface.

If a wave has amplitude of 2 meters, a wavelength of 2 meters, and a frequency of 10 Hz, and a period of 1 second, then at what speed is the wave moving?