Answer:

This means that the center of mass is locates 0.72m from the 750N force

Explanation:

Since the board is 2.2m long, that will be the length of the board.

Let the center of mass of the body be hinged at the center using a knife edge as shown in the diagram attached.

Let x be the distance from the 750N force to the knife edge and the distance from the 360N force to the knife edge be 2.2-x

Using the principle of moment which states that the sum of clockwise moment is equal to the sum of anti clockwise moment.

Moment = force × perpendicular distance

For ACW moment;

Moment = 750×x = 750x

For the CW moment;

Moment = 360 × (2.2-x)

Moment = 792-360x

Equating ACW moment to the clockwise moment we have;

750x = 792-360x

750x+360x = 792

1110x = 792

x = 792/1110

x = 0.72m

This means that the center of mass is locates 0.72m from the 750N force

**Answer:**

The answer is below

**Explanation:**

Because of the resistance of transmission lines, high current along the line leads to large voltage drop. This voltage drop causes low efficiency because the voltage at the receiving end is far less than that at the sending end.

Therefore there is need to transmit at a higher voltage (smaller current) than that required by distribution because of efficiency.

Hence, For safety and efficiency, the voltage must be large in the transmission lines and small in the distribution lines.

**Answer:**

C. 600 N

**Explanation:**

Given,

mass of object (m)= 300kg

acceleration(a) =2m/s^2

We know that,

Force(F)=ma

=300*2

=600N

So,600N force is required to give an object.

**Answer: Since you haven't provided any answer choices, the answer would be the object with the greatest mass, like the earth vs the sun. The sun is obviously way bigger therefore has more graviational pull.**

**Hope this helps!**