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When a constant force is applied to an object, the acceleration of the object varies inversely with its mass. When a certain constant force acts upon an object with mass 25 kg, the acceleration of the object is 2 m/s^2. When the same force acts upon another object, its acceleration is 5 m/s^2 . What is the mass of this object?

Respuesta :

Given:

mass of object, m = 25 kg

accelaration of the object, a = 2 m/[tex]s^{2}[/tex]

accelaration when force acts upon another object, a' = 5 m/[tex]s^{2}[/tex]

Explanation:

To find the mass m' of the object:

Given that:

mass ∝[tex]\frac{1}{accelaration}[/tex]

Also, from Newton's second law of motion:

F = ma                                (1)

where,

F = force

Now, using eqn (1)

F = [tex]m\times a[/tex]

F =  [tex]25\times 2[/tex] = 50 N

Now, since constant force acts on both the objects:

Therefore, F' =  [tex]m'\times a'[/tex] = F

50 =  [tex]m'\times 5[/tex]

m' = 10 kg

Therefore, the mass, m' of the second object is 10 kg