Answer:
Work done is 0
Explanation:
From the question we are told that
Weight of block =15.0kg
Force acting on the block = 70.0N
At an angle of 20 degree
Displacement of block is 5m
Coefficient of kinetic friction 0.3
b) Generally work done by force is give by 
therefore
c) there is no work done by the normal force in this scenario because
normal force in this case is perpendicular to the displacement of the motion
d) The displacement in the vertical direction is 0
Therefore the gravitational work done is 0
e)Generally in finding work done by friction we first find frictional force
Mathematically the equation for frictional force is given 
Given that
Mathematically solving to get work done by frictional force 
the frictional force work done is
Explanation:
The carbon film acts as the resistive material to the electric current. Hence, the carbon film blocks some amount of electric current.
Therefore, these resistors can withstand at higher temperatures without any damage.
hope it helps !
Answer:
Only a decreasing gravitational force that acts downward
Explanation:
The gravitational force is the gravitational pull which attract a mass of smaller size by the mass of a bigger size. It is the force which attract two masses close to each other.
In the context, when a ball is tossed up from the surface of an asteroid that have no atmosphere, the ball rises up and then falls back to the surface of the asteroid. The ball falls back because the gravitational pull of the asteroid pulls back the ball to its surface. Thus a decreasing gravitational force acts on the ball in the downward direction while the ball is in its way up.
Explanation:
in my opinion I'd say it's gravity because it's making the book stay in it's one and only position pulling the book at the center of the desk
