Question

When a mass rests on a surface, the surface "pushes up" on the object with a force that is equal in

magnitude to the gravitational force exerted by the object on the surface. This is sometimes called the
"normal force." Suppose that a 30 kg basset hound rests on a couch. What is the magnitude of the normal
force that the couch exerts on the dog? Hint: the acceleration due to gravity on the Earth's surface is 9.8
m/s2 and 1 newton = 1 kg m/s2

Answer 1

Answer: 294 N

Step-by-step explanation:

Since the Normal Force
`N` is equal to the weight
`W` of the dog, we have:

`N=W=m.g`

Where:

`m=30 kg` is the mass of the dog

`g=9.8 m/s^(2)` is the acceleration due to gravity on the Earth's surface

Solving:

`N=W=(30 kg)(9.8 m/s^(2))`

`N=294 N`