Adog sits on a flat surface. if the dog has a mass of 13 kg, what is the normal force acting on it?

The normal force acting on it is 127.4 N.

Explanation:

Given that,

Mass of a dog = 13 kg

Normal force :

The supported force exerted upon a dog that is in contact with the surface it is called normal force.

Normal force is defined as:

Where,

F = normal force

m = mass of dog

g = acceleration due to gravity

Put the value of mass into the formula

Negative sign shows the upward direction of the normal force.

Hence, The normal force acting on it is 127.4 N.

28. evolution

29. environment, survive, offspring  

explanation:

wire in brush may conduct electricity from cell to drill and vice versa electrc shock possible