Answer:
Explanation:
Given
mass of lumber jack
mass of floating log
velocity of lumber jack =3.74 m/s (w.r.t. shore)
conserving momentum
Initial momentum=Final momentum
(b)For second Log
Conserving Momentum
Initial momentum of log and Lumber jack=Final momentum of log and lumberjack
u is final velocity of lumberjack and log
Explanation:
Mass of the wheel, m = 49 kg
Radius of the hoop, r = 0.73 m
Initial angular speed of the wheel,
Final angular speed of the wheel,
Time, t = 22 s
(a) If I is the moment of inertia of the hoop. It is equal to,
We know that the work done is equal to change in kinetic energy.
W = -1858.05 Joules
(b) Let P is the average power. It is given by :
P =84.45 watts
Hence, this is the required solution.
Answer:
C. Potential energy is related to an object's position, and kinetic
Explanation:
The energy contained in the small motions of the object's molecules can be broken up into a combination of microscopic kinetic energy and potential energy.
Explanation:
Given that,
Radius of a spherical shell, r = 0.71 m
Electric field that points radially toward the center of the sphere is 936 N/C
(a) Let q is the net charge within the sphere's surface. Using Gauss's law, we can find it :
(b) Gauss's law is used to find the amount of charge enclosed within a surface. It doesn't say anything about the distribution of the charge inside the spherical shell.
Answer:
3 m/s
Explanation:
Speed in m/s would just be 60 m / 20 s = 3 m/s