Work = (force) x (distance)
Each time she lifts the weight, she does
(550 N) x (0.5 m) = 275 joules of work against gravity.
Each time she lets the bar down gently, gravity does
(550 N) x (0.5 m) = 275 joules of work against her muscles.
If the human physical muscular system were 100% efficient, and capable
of absorbing work as well as spending it, then the bodybuilder would do
exactly zero work in the process of 1-up followed by 1-down.
Answer:
The amplitude measures the height of the crest of the wave from the midline. The wavelength measures the horizontal distance between cycles.
Explanation:
Given that,
Speed = 3.5 m/s
Magnetic field = 50μT
Angle = 60°
(A). We need to find the direction of magnetic force
Using formula of magnetic force
Here, = down
But , charge is negative.
So, the direction of magnetic force will be up.
(B). We need to calculate the magnetic electric field
Using formula of magnetic force
Where, v = speed
B = magnetic field
Put the value into the formula
Hence, (A). The direction of magnetic force is UP
(c) is correct option
(B). The magnetic electric field is
(b) is correct option