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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

Respuesta :

cryssatemp

Answer: 294 N

Explanation:

Since the Normal Force [tex]N[/tex] is equal to the weight [tex]W[/tex] of the dog, we have:

[tex]N=W=m.g[/tex]

Where:

[tex]m=30 kg[/tex] is the mass of the dog

[tex]g=9.8 m/s^{2}[/tex] is the acceleration due to gravity on the Earth's surface

Solving:

[tex]N=W=(30 kg)(9.8 m/s^{2})[/tex]

[tex]N=294 N[/tex]

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