Answer:
Power output =
Explanation:
Given:
Mass of the elevator is,
Height to which it is raised is,
Acceleration due to gravity is,
Time taken by the motor to raise the elevator is,
Now, work done on the elevator by the motor is equal to the increase in the gravitational potential energy of the elevator.
Increase in gravitational potential energy is given as:
Therefore, work done by motor is,
Now, we know that, power is work done in unit time. So, power output is given as:
Therefore, the power output of the first motor is
The electromagnetic radiation produced when a charged particle moves spirally in a magnetic field is called <span>synchrotron radiation. This phenomenon occurs due to the fact the particle is accelerated radially (due to the presence of the magnetic field), and every charged particle when it is accelerated emits electromagnetic radiation.</span>
<u>Any time the coin is on the table:</u>
-- gravity acting downwards
-- normal force of the table, acting upwards
<u>Any time the coin is moving:</u>
-- friction force, on the coin's underside
-- air resistance
Both of these act opposite to the direction of the coin's motion.
<u>During the flick, while your finger is still touching the coin:</u>
-- the flicking force, a push exerted by your finger
The force ends as soon as the coin leaves contact with your finger.
You didn't say the following answers but it's Joule (J). If this answer doesn't match the offered ones, you can ask me again
Padded dashboards make automobiles safer because it will increase the time required to stop your head from moving forward during an accident. The increased stopping time results in a smaller force being applied to the person's head.