Answer:
the maximum force will be equal to 134.84 N
Explanation:
We have given mass m = 43 kg
Coefficient of static friction
Acceleration due to gravity
We have to find the maximum force which , when applied there is no movement of crates
This maximum force will be equal to frictional force
Frictional force is given by
So the maximum force will be equal to 134.84 N
Answer:
d. NO
Explanation:
As, the potential energy between charge one and two does not depend upon the charge third, so it is very much possible to bring a third charge in from infinity without changing the potential energy of the system. And it does not matter what the sign of the third charge it.
Hence, the correct answer is D.
Answer: 20580 Joules of work is done by the firefighter.
Explanation:
Work done is defined as the force times distance travelled.
work=
Given:
mass= 75 kg
acceleration due to gravity =
h= height = 28 m
Putting in the values we get,
work=
Thus 20580 Joules of work is done by the firefighter.
There is no correct description on that list of choices.
Aristotle's laws of association~~~~~ Law of contiguity, similarity, contrast, frequency
I hope that helps my friend