Physics
Grade-7
Easy
Question
Direction : Calculate the missing term
m = ?
v = 30 m/s
K.E. = 270 J
- 0.6 kg
kg- 10 kg
- 6 kg
Hint:
0.6 kg
The correct answer is: 0.6 kg
KE =
mv2
270 =
× m × (30)2
![straight m space equals space fraction numerator begin display style stack up diagonal strike 270 with 3.9 on top end style space cross times space 2 over denominator up diagonal strike 30 space cross times space up diagonal strike begin display style 30 with 10 below end style end strike end fraction](data:image/png;base64,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)
=
= 0.6 kg
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![KE space equals space 2 mv squared](data:image/png;base64,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)
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