Answer:
No work is done since no distance is given
Explanation:
Since no distance is given, the force is not doing any work
No work is done by the man since we do not know the distance or displacement.
Work is only said to be done when the force applied on an object moves it through a particular distance.
Work done = Force x distance.
Since no distance is given in this problem, we can as well assume that the force applied is doing no work on the object.
Answer:
v_{f2} = √ 2 v_{f}
Explanation:
Work and kinetic energy are related by
W = ΔK
The formula for work is
W = F . d
The formula for kinetic energy is
K = ½ m v²
W = 
- K₀
Since the body starts from rest, the initial velocity is ro and therefore the kinetic energy is zero.
W = K_{f}
W = ½ m v_{f}²
v_{f} = √ 2W / m
If W = 2 W₀
v_{f2} = √ 2 (2W₀) / m
v_{f2} = √ 2 √2W₀ / m
v_{f2} = √ 2 v_{f}
Protons are usually regarded by their mass, as mass is not specific to any gravitational acceleration. However, if you wished to find the weight of a proton on Earth, it would be:
Force (weight) = mass of proton * acceleration due to Earth's gravity
F = ma
F = (1.62 x 10^-27)(-9.8)
F = 1.5876 * 10^-26N
If you provided the aforementioned line 19, that would kinda be great.
