It would be the 4th option. there is no other explanation. it’s the easiest question
Answer:
259.2 Joule
Explanation:
Spring constant, K = 360 N/m
mass, m = 20 kg
Amplitude, A = 1.2 m
According to the equilibrium of force
The mechanical energy lost is given by
U = 0.5 KA²
U = 0.5 x 360 x 1.2 x 1.2
U = 259.2 Joule
<h2>
SOLUTION OF EACH CASES ARE GIVEN BELOW.</h2>
Explanation:
We know magnetic field due to a charge q moving with a velocity v .
Case A:
r=0.5i
Putting value of r, q and v .
We get,
Case B:
r=0.5 j
B=0
Case C:
We get,
Case D:
We get , .
Learn more:
Magnetism
brainly.com/question/14188434
Here we will the speed of seagull which is v = 9 m/s
this is the speed of seagull when there is no effect of wind on it
now in part a)
if effect of wind is in opposite direction then it travels 6 km in 20 min
so the average speed is given by the ratio of total distance and total time
now since effect of wind is in opposite direction then we can say
Part b)
now if bird travels in the same direction of wind then we will have
now we can find the time to go back
Part c)
Total time of round trip when wind is present
now when there is no wind total time is given by
So due to wind time will be more