Physics
Grade-7
Easy
Question
Direction : Calculate the missing term
m = 12 kg
v = ?
K.E. = 240 J
- 2
m/s - 20 m/s
- 40 m/s
m/s
Hint:
2√10 m/s
The correct answer is: 2
m/s
KE =
mv2
240 =
× 12 × v2
![straight v squared space equals space 240 over 6](data:image/png;base64,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)
= 40
v = 2
m/s
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![KE space equals space 2 mv squared](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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)
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