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A Force of 20 N Acts Upon a Body Whose Weight is 9.8 N. What is the Mass of the Body and How Much is Its Acceleration ? (G = 9.8 M S-2). - CBSE Class 9 - Science

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Question

A force of 20 N acts upon a body whose weight is 9.8 N. What is the mass of the body and how much is its acceleration ? (g = 9.8 m s-2).

Solution

W (weight of the body) = 9.8N
m (mass of the body) = ?
g (acceleration due to gravity) = 9.8 m/s2
W= mg
9.8 = m × 9.8
9.8 /9.8 = m
1 = m
Answer: Mass = 1kg

F (force) = 20N
M (mass of body) = 1kg
F = m × a
20 = 1 × a
20/1 = a
a = 20m/s2
Answer: Acceleration = 20m/s2

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APPEARS IN

 Lakhmir Singh Solution for Science for Class 9 Part 1 Physics (2016 to Current)
Chapter 3: Gravitation
Short Answers | Q: 45 | Page no. 102

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Solution A Force of 20 N Acts Upon a Body Whose Weight is 9.8 N. What is the Mass of the Body and How Much is Its Acceleration ? (G = 9.8 M S-2). Concept: Mass and Weight.
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