Physics
Grade-7
Easy
Question
Direction : Calculate the missing term.
m = 10 kg
K.E. = 250 J
v = ?
- 2500 m/s
![square root of 50](data:image/png;base64,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)
- 50 m/s
- 10 m/s
Hint:
√50
The correct answer is: ![square root of 50](data:image/png;base64,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)
![KE space equals space 1 half mv squared
straight v squared space equals space fraction numerator 2 KE over denominator straight m end fraction
equals space fraction numerator 2 space cross times space 250 over denominator 10 end fraction](data:image/png;base64,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)
= 50
![Error converting from MathML to accessible text.](data:image/png;base64,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)
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![KE space equals space 2 mv squared](data:image/png;base64,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)
What is wrong with the given formula?
![KE space equals space 2 mv squared](data:image/png;base64,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)
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