A heavy box is slid across a rough floor with an initial speed 4ms it stops moving after 8s if the average resisting force of friction is 10N then the mass of box is(in kg)
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Answer:
20 kg
Explanation:
v=u+at
0=4+a(8)
a=-4/8
a=0.5m/s^2
f=ma
10=m(.5)
m=10/.5
m=20kg
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