Answer:
D. 4 m
Explanation:
According to the work-energy theorem, the work done by the force acting on a body modifies its kinetic energy.
The car comes to rest after a given distance, so . Recall the definition of work , here F is the constant force acting on the car, d is its traveled distance and is the angle between the force and the displacement, since friction force acts opposite to the direction of motion :
We have:
Thus:
False.
The mass of a softball is approximately 200 g (0.2 kg), while the knees are located approximately at 30 cm (0.3 m) from the ground. It means that the gravitational potential energy of the ball when it is dropped is
This corresponds to the total mechanical energy of the ball at the moment it is dropped, because there is no kinetic energy (the ball starts from rest). Then the ball is dropped, and just before it hits the ground, all this energy is converted into kinetic energy: but energy cannot be created, so its final kinetic energy cannot be greater than 0.6 J.
The actions that would decrease the width of the central bright are decrease in the wavelength of the light and Increase in the width of the slit.
<h3>Wavelength of the light</h3>
The wavelength of the light is determined using the following formulas;
where;
- λ is wavelength
- d is width of the slit
- D is the distance of the screen
- y is distance between the central bright fringe and dark fringe
<h3>Actions that would decrease the width of the central bright</h3>
y = (λD) / (d)
- Decrease in the wavelength of the light
- Increase in the width of the slit
Thus, the actions that would decrease the width of the central bright are decrease in the wavelength of the light and Increase in the width of the slit.
Learn more about central bright fringe here: brainly.com/question/14264436