Answer:
The number of crates is 84580.
Explanation:
mass, m = 30 kg
height, h = 0.9 mm
Power, P = 0.5 hp = 0.5 x 746 W = 373 W
time, t = 1 minute = 60 s
Let the number of crates is n.
Power is given by the rate of doing work.
The universal law of gravitation states that the force of attraction between two objects depends on which quantities?
1 answer:
Answer:
D. the masses of the objects and the distance between them
Explanation:
Gravitation is a force, a force doesn't care about the shape or density of objects, only about their masses... and distances.
And you can get it using the following equation:
Where :
G is the universal gravitational constant : G = 6.6726 x 10-11N-m2/kg2
m represent the mass of each of the two objects
d is the distance between the centers of the objects.
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Complete Question
The complete question is shown on the first uploaded image
Answer:
The value of and
Explanation:
Considering the diagram,
Taking moment about the pivot , we have
=>
Generally given that the bar is at equilibrium then the upward forces is equal to the down ward force
So
=>
=>
