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7 Jul 2009 18:54:01 IST

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a force of 20N acts upon a body whose weight is 9.8N. What is the mass of the body how much is its a

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a force of 20N acts upon a body whose weight is 9.8N. What is the mass of the body how much is its acceleration?correct answer is 1Kg and 20m/s squareplease explain

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Anirudh Kumar

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Joined: 25 Jan 2009

Posts: 246

7 Jul 2009 19:12:40 IST

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it's very simple .

weight = mass * g

=> 9.8 = m * 9.8

=> mass = 1 kg

now when force = 20 N

a = F/m = 20/1 = 20 m/s²

Sagar Saxena

Forum Expert

Joined: 8 Oct 2008

Posts: 7221

8 Jul 2009 11:41:36 IST

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as we know F=ma

where F is the force,m is mass and a is the acceleration

W=m*9.8

or 9 .8=m*9.8

so m=1kg

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