Question

In 10s, abody of 6 kg mass is dragged 8 m with uniform velocity across a floor by a steady force of
20 N. The K.E of the body is
[ ]
a) 2.92
J
b) 0.92 J
c) 1.92 J
d) 19.2 J​

Answer 1

Answer:

1.92J

Explanation:

KE = 1/2 mv^2

mass of the body = 6kg

velocity = displacement / time

displacement = 8m

time = 10s

velocity = 8/10 =  4/5 = 0.8 m/s

So,

KE = 1/2(6)(0.8)^2

KE = 1.9J

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