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Physics

Grade-7

Easy

Question

Direction : Calculate the missing term
m = 100 gm
v = 2 m/s
K.E. = ?

5 J
0.2 J
0.5 J
2 J

hint Hint:

0.2 J

The correct answer is: 0.2 J

KE = $1 half$ mv²
$equals space 1 half space cross times space 100 over 1000 space cross times space left parenthesis 2 right parenthesis squared$
$equals space 1 over 10 space cross times space 2 equals space 1 fifth$
= 0.2 J

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