The formula NaCl is composed of which two elements
1 answer:
You might be interested in
Answer:a
Explanation:
We have to lift the load two loads up one story, so energy required is
let m be the mass of each load and h is the height of each story
Energy
Here energy gained is the potential energy which depends upon the datum(floor).
For lifting one load up one story
Energy required
thus is half of
So option a is correct
The first thing we must do for this case is the sum of forces in a horizontal direction.
We have then:
Substituting values we have:
From here, we clear the mass of the object:
We now look for the weight of the object.
Where,
g: acceleration of gravity (9.8 m/s^2)
Substituting values:
Answer:
the weight of the object is:
option 4