<u>Statement</u><u>:</u>
A body is under the action of a force F such that the force-displacement graph of the body is semicircle as shown above. The work done on the body by the force in moving through 24 meters.
<u>To </u><u>find </u><u>out</u><u>:</u>
The work done by the body.
<u>Solution</u><u>:</u>
- Here force is F and let us consider the displacement as s.
- We know, work done = Fs.
- Here the area under the curve is Fs, i.e., work done.
- We know, area of a semicircle = where r is the radius.
- Here, radius (r) = 24 m
- Therefore, work done
<u>Answer</u><u>:</u>
The work done is 288π m².
Hope you could understand.
If you have any query, feel free to ask.
Answer:
Lenz’s law states that an induced magnetic field in a conductor opposes the applied flux through the conductor.
Explanation:
According to the Lenz's law, the direction of induced e.m.f is such that it generates a current which in turn produces a magnetic field that would oppose the change causing it.
In other words, the direction of any magnetic induction effect is such that it opposes the cause of the effect.
Therefore; an induced magnetic field in a conductor, opposes the applied flux through the conductor.
The answer is B. An antitussive will help a cough by deterring the cough reflex.
Answer:
The speed of the plank is 81.68 m/s
Explanation:
Given that,
Speed of bullet = 152 m/s
Speed of wood = 128 m/s
Speed of another bullet = 97 m/s
We need to calculate the speed of plank
Using conservation of momentum
Where,
u = initial velocity
v = final velocity
....(I)
....(II)
From equation(I) and equation(II)
Hence, The speed of the plank is 81.68 m/s
Answer:
Frequency – The frequency of a wave is the number of waves that pass a given point in a certain amount of time. Frequency is measured in units called hertz (Hz), and is defined as the number of waves per second. A wave that occurs every second has a frequency of 1 wave per second (1/s) or 1 Hz.