When Isabella pushes a box of mass 5.25 kilograms with a force of 15.7 newtons, it accelerates by a rate of 2.50 meters/second2.
2 answers:
Answer:
The coefficient of friction is 0.05
Explanation:
Given that,
When Isabella pushes a box of mass 5.25 kilograms with a force of 15.7 newtons.
It accelerates by a rate of 2.50 m/s²
Let coefficient of friction be μ
Force (F) = 15.7 N
Acceleration (a) = 2.5 m/s²
Mass (m) = 5.25 kg
Gravity (g) = 9.8 m/s²
Balanced equation of box to move
F - μmg = ma
15.7 - μ(5.25)(9.8) = (5.25)(2.50)
Hence, The coefficient of friction is 0.05
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<h2>Answer: 1000 J</h2>
The Work done by a Force
refers to the release of potential energy from a body that is moved by the application of that force to overcome a resistance along a path.
It should be noted that it is a scalar magnitude, and its unit in the International System of Units is the Joule (like energy). Therefore, 1 Joule is the work done by a force of 1 Newton when moving an object, in the direction of the force, along 1 meter:
Now, when the applied force is constant and the direction of the force and the direction of the movement are parallel, the equation to calculate it is:
(1)
When they are not parallel, both directions form an angle, let's call it . In that case the expression to calculate the Work is:
(2)
For example, in order to push the 200 N box across the floor, you have to apply a force along the distance to overcome the resistance of the weight of the box (its 200 N).
In this case both <u>(the force and the distance in the path) are parallel</u>, so the work performed is the product of the force exerted to push the box
by the distance traveled
. as shown in equation (1).
Hence:
>>>>This is the work