Answer:
It Is 25J greater.
Explanation:
Applying the Energy conservation theorem, we have:
The Work done by the ice worker is given by:
The angle is 180 degrees because the force exerted by the worker is opposite to the motion.
If the rope was not there, the external work is 0, so:
The kinetic energy is 25J greater without the rope.
Answer:
a) 8.80 N
b) 4.78 N
Explanation:
The weight of the book is
By Newton's third law, the reaction from the table, R, is equal to its weight.
R = 19.9143 N
From the law of solid friction,
F is the maximum frictional force and is the coefficient of friction.
a) The force needed to begin moving the book is that needed to overcome static friction
b) The force needed to move the book at constant speed once it begins moving is that needed to overcome kinetic friction
The girls distance is 50 km in 2 hours.
Answer:
<h2>The potential difference is 60mV</h2>
Explanation:
This problem bothers on application of the expression for motion emf which is expressed as
where B= magnetic field in Tesla
l= length of the conductor
v= speed of conductor
Given data
l= 2 meters
v= 6 m/s
B= 5 Tesla
Applying the formula we have
speed = distance/time
= 150/18
= 8.33 m/sec
hope this helps :)
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