Answer:
Because in order for work to be done on an object, the object must be moving. Why isn't work being done on a barbell when a weight lifter is holding the barbell over his head? Work is maximized when force is applied in the same direction that the object is moving. ... In order to do work faster, more_is required.
Answer:12.5 W
Explanation:
work = force * distance
175 J = 25N * d
d = 7 meters ◄
power = work / time
P = 175J / 14s = 12.5 W ◄
The correct answer is option (3).
The horizontal component of the force pushing the skier in forward direction is 36.75 N or 37 N.
In Physics, force is defined as the effect that changes the direction of motion of an object or brings a moving object to halt.
In other words, a force is a pull or push which is applied to any object. It is a vector quantity and is measured in Newton (N).
The weight of the skier = 75 Kg
To find the horizontal component of force we will use the following information.
Frictional force due to ice, F = μN
Normal force N = mg = 75 x 9.8 = 735 N
Now let's calculate the Frictional force = 0.05 x 735 = 36.75 N
We know that the value of Coefficient of friction (μ) for ice is 0.05.
If you need to learn more about force click here:
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