Answer:
Explanation:
From the question,
The kinetic energy of protons
K = 7eV.
Mass of proton and the speed of light are the given parameters.
Please kindly go through the files I attached for a step by step explanation of the answer required.
A bathroom scale is compressed 0.11 in. when a 110-lb person stands on it. Assuming that the scale behaves like a spring that o
1 answer:
Answer:
(a) 220 lb
(b) 10.75 in-lb
Explanation:
(a) We know that if a 110 lb person compresses the spring 0.11 inches, then a person weighing double that amount will compress the spring double, i.e. the person would weigh 220 lb.
(b) The amount of work done in compressing the spring 0.11 inch is given by the integral:
110/.11=1210
=10.75 in-lb
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. For Newton's second law, the resultant of the forces acting on the skier must be equal to ma (mass per acceleration), so we can write:
Where the negative sign is due to the fact the friction is directed against the motion of the skier.
Simplifying and solving, we find the value of the acceleration:
Now we can use the following relationship to find the distance covered by the skier before stopping, S:
where
is the final speed of the skier and 
is the initial speed. Substituting numbers, we find:
We are only concerned with the horizontal direction, since the skier is moving in this direction, so we can neglect forces that do not act in this direction. So we have only one horizontal force acting on the skier: the frictional force,
Where the negative sign is due to the fact the friction is directed against the motion of the skier.
Simplifying and solving, we find the value of the acceleration:
Now we can use the following relationship to find the distance covered by the skier before stopping, S:
where