Question

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Answer 1

Answer:

800N

Explanation:

I) force/weight= Mass × Gravitational Force

weight= 80×10

800N

Answer 2

Answer:

(I) 784N

(II) 584N

Mass is constant

Explanation:

The mass of an object remains constant irrespective of any force acting on it.

Therefore mass of the object on earth and Mars or any where else would be the same ,i.e, 80kg

Now for the weight, the weight depends upon the acceleration due to gravity (g) as it is a measure of force exerted by it.

On earth,

g = 9.8 m/s^2

Weight = mass x g

= 80 x 9.8

= 784 N

On Mars,

g = 7.3 m/s^2

Weight = mass x g

= 80 x 7.3

= 584 N