Question

A ball of 200 g mass is moved with 20 m/s, and decreases to 10 m/s in 5 seconds due to air friction. So, force of friction due to air is a] 1 N b] 4 N c] 0.4 N d] 10 N

Answer 1

Answer:(C) 0.4N is the correct answer

Explanation:MASS=200g or 0.2kg

u=20m/s

v=10m/s

T=5s

a=v-u÷t

=10-20÷5

=-2m/s²

FORCE=MASS× ACCELERATION

=0.2×2

=0.4N

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Answer 2

i hope ot will help u

C) option is correct

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