<h2>Answer </h2>
The torque is 60 Nm.
<u>Explanation</u>
The torque of a system whose force is 30 N and the length is 2 m, then the torque is 60 Nm. The formula for torque is ( Force ) x ( moment arm ). Hence by putting values in the formula, torque = ( 30 N ) ( 2 m) which is equal to 60 Nm. The unit for torque is newton-meter (Nm). Torque is the turning effect or the force which tends to move the object in a circle and tends to rotate around a circle. Torque is a vector quantity.
The SI base units for torque is kg ⋅ m 2 ⋅ s − 2.
Answer:
The line charge density is 
Explanation:
Given that,
Diameter = 2.54 cm
Distance = 19.6 m
Potential difference = 115 kV
We need to calculate the line charge density
Using formula of potential difference



Where, r = radius
V = potential difference
Put the value into the formula


Hence, The line charge density is 
Water erosion will make the soil disappear
Answer:
The new force becomes (1/9)th of the original force.
Explanation:
The gravitational force between two masses is given by :

Where
r is the distance between masses,
If the new distance is, r' = 3r
The new force is given by :

So, the new force becomes (1/9)th of the original force.