Answer: 1.274 N minimum force required to slide the book across the surface
Explanation:
Mass of the book = m = 0.2 kg
Normal force acting on the book,N = mg
Coefficient of friction =
= 0.65
Minimum force required to slide the book across the surface= F


1.274 N minimum force required to slide the book across the surface
<u>Answer:</u>
Mass in kg = 39.88
Mass in pounds = 87.92
<u>Explanation:</u>
We have the expression for Density, ρ = Mass / Volume, in this case density is given and we need to find mass and volume.
Volume of a sphere, we have the expression
, where r is the radius of sphere.
Radius of sphere, r = Half of diameter = 15/2 = 7.5 cm
So 
Mass = Volume * Density = 1767.15*22.57 = 39884.49 g
Mass in kg = 39884.49/1000 = 39.88 kg
Mass in pounds = 39.88*2.205 = 87.92 lb
The statement which describes how a machine can help make work easier is that It can put out more force than the input force by decreasing the distance over which force is applied, therefore the correct option is option A.
<h3>What is work done?</h3>
The total amount of energy transferred when a force is applied to move an object through some distance
The work done is the multiplication of applied force with displacement.
Work Done = Force * Displacement
As work done depends both on the force as well as the displacement force and be reduced by reducing the displacement if the same amount of work is performed by the machine.
The correct answer is option A since the statement that describes how a machine might assist in making work easier says that it can put out greater force than the input force by reducing the distance over which force is exerted.
Learn more about work done from here
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Answer:
Electric is produce by water it is very helpful in our life