To calculate the change in kinetic energy, you must know the force as a function of position. The work done by the force causes the kinetic energy change
Explanation:
The work-energy theorem states that the change in kinetic enegy of an object is equal to the work done on the object:
where the work done is the integral of the force over the position of the object:
As we see from the formula, the magnitude of the force F(x) can be dependent from the position of the object, therefore in order to solve correctly the integral and find the work done on the object, it is required to know the behaviour of the force as a function of the position, x.
This question involves the concepts of density and mass.
The mass of water, displaced is "B. 20 g".
<h3>MASS OF DISPLACED WATER</h3>
First, we will find out the volume of the woodblock by using the density of wood:
where,
- = density of wood = 1 g/cm³
- m = mass of wood = 20 g
- V = Volume of wood = ?
Therefore,
V = 20 cm³
Now, this is the same volume as the volume of water displaced by this block of wood. Hence, using the density of water, w can find the mass of water displaced:
m = 20 g
Learn more about density here:
brainly.com/question/952755
Answer:
The answer of this question is =1.258*10-4
Answer:
It states that the time rate of change of the momentum of a body is equal in both magnitude and direction to the force imposed on it.