Answer:
W = 0
Explanation:
We are given with, a construction worker is carrying a load of 40 kg over his head and is walking at a constant velocity. He travels a distance of 50 m.
The work done by an object is given by :
F = ma
So,
m is mass
a is acceleration
d is displacement
The worker is moving with constant velocity, its acceleration will be 0. So, the work done by the worker is 0.
_dThe radius of curvature of a subatomic particle under a magnetic field is given by the following formula:
Where:
We can determine the quotient between the velocity and the charge of the deuteron particle from the formula. First, we divide both sides by the mass:
Now, we multiply both sides by the magnetic field "B":
Since the charge of the deuterion is the same as the charge of the proton and the velocity we are considering are the same this means that the quotient between velocity and charge is the same for both particles. Therefore, we can apply the formula for the radius again, this time for the proton:
And substitute the quotient between velocity and charge:
Now, we cancel out the magnetic field:
Now, we substitute the values:
Solving the operations:
Therefore, the radius is 19.3 cm.
Answer:
2 revolutions
Explanation:
Assume that when she runs off the edge of the 8.3m high cliff, her vertical speed is 0. So gravitational acceleration g = 9.8m/s2 is the only thing that makes her fall down. So we can use the following equation of motion to calculate the time it takes for her to fall down:
where s = 8.3 m is the distance that she falls, t is the time it takes to fall, which is what we are looking for
Since she rotates with an average angular speed of 1.6rev/s. The number of revolutions she would make within 1.3s is