Question

a force of 400.0n causes a body to increase its speed by 4.0m/s in 3.0 s mass and weight of the body

Answer 1

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Answer 2

Answer:

given = force (F) = 400N

             speed = 4.0 m/s

             time = 3.0sec

to find =  mass and weight of body

solution ;-

use the 1st equation of motion,

v    = u + at

4.0 =  0 + a × 3

4.0 =   0 + 3a

3a  =   4.0

a    =   4/ 3

a   =  1.33

now use the newtons second law,

mass = force / accelaration

mass =  400 / 1.33

mass = 300 Kg