If he moves the piano 4 meters, with 700 newtons of force
in the direction of the motion, then the work done is
Work = (force) x (distance)
= (700 N) x (4 m) = 2,800 joules .
If he does all of that in 2 seconds, then
he did it at the rate of
(work) / (time) = (2,800 J) / (2 sec) = 1,400 watts
(about 1.88 'horsepower' !)
Construction, like building a home/building, digging, like in a mine, and opening a soda can, where the part to open is a lever.
Visible range of electromagnetic radiation
The linear velocity of the wheel is 16 m/s.
<h3 /><h3>What is linear velocity?</h3>
Linear velocity is the rate of change of displacement with regard to time when the object is moving in a straight line
To calculate the linear velocity of the wheel, we use the formula below.
Formula:
- v = ωr............. Equation 1
Where:
- v = Linear velocity
- ω = Angular velocity
- r = Radius of the wheel.
From the question,
Given:
Substitute these values into equation 1
Hence, The linear velocity of the wheel is 16 m/s.
Learn more about linear velocity here: brainly.com/question/25749514
I dont see a question 38 for the second one