The strength of gravity on Mars is only $40 %$ of that on earth. If a child has a mass of $60 k g$ on earth, what would the child's weight be on Mars?

24 N

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60 N

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240 N

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600 N

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None of the above is correct within

10 %

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Solution

The correct option is D $240 N$
Given,

Mass, $m = 60 k g$

Gravity on earth, $g = 10 m s^{- 2}$

Gravity on mars, $g^{'} = 0.4 g = 4 m s^{- 2}$

Weight on mars, $W = m g^{'} = 60 \times 4 = 240 N$

Hence, weight on mars is $240 N$

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The strength of gravity on Mars is only 40% of that on earth. If a child has a mass of 60 kg on earth, what would the child's weight be on Mars?

The correct option is D 240 NGiven, Mass, m=60kg Gravity on earth, g=10ms−2 Gravity on mars, g′=0.4g=4ms−2 Weight on mars, W=mg′=60×4=240N Hence, weight on mars is 240N

The strength of gravity on Mars is only $40 %$ of that on earth. If a child has a mass of $60 k g$ on earth, what would the child's weight be on Mars?

The correct option is D $240 N$
Given,

Mass, $m = 60 k g$

Gravity on earth, $g = 10 m s^{- 2}$

Gravity on mars, $g^{'} = 0.4 g = 4 m s^{- 2}$

Weight on mars, $W = m g^{'} = 60 \times 4 = 240 N$

Hence, weight on mars is $240 N$