The last option would be I think
Answer:1) 100 gm mass should be placed at 95 cm mark.
2) Mass of 112.5 gm should be placed at 90 cm mark.
Explanation:
For equilibrium of the meter stick the sum of the moment's generated by the masses should be equal and opposite
Answer to part b)
Since a meter stick is 100 cm long and it is pivoted at it's center i.e at 50 cm
Thus
1) Moment generated by 100 gm mass about center =
Let a mass 'm' be placed at 90 cm mark thus moment it generates equals
Equating both the moments we get
Answer to part a)
Let the 100 grams weight be placed at a distance 'x' right of center
Moment generated by 100 grams weight equals
equating the moments of the forces we get
thus the mass of 100 gm should be placed at 95 cm mark in the scale.
It is an real machine because if efficiency is below100% it is real machine but if efficiency is 100% it is an ideal machine
Explanation:
The relation between pressure and area is as follows;
Here, P is the pressure, F is the applied force and A is the area.
There is an inverse relationship between the pressure and area.
If the area is less then the pressure is more. If the area is more then the pressure is less.
It is given in the problem that It is much easier to slice a piece of pie with the edge of a sharp knife than with the edge of a pencil. The area of the edge of a pencil is more than the area of the edge of the knife. Then, less pressure is applied in case of using the edge of the pencil.
More force is required to cut the slice of pie by using pencil.
Answer:
A.
Explanation:
It will stay in motion unless for example, someone stops it from going.