An object with a speed of 20.meters per second has a kinetic energy of 400. J. The mass of the object is
A .1.0 kg
B. 2.0 kg
C. 0.50 kg
D. 40 kg

explain why

Option B. 2.0 kg

Explanation:

Data obtained from the question include:

V = 20m/s

K.E = 400J

m =?

K.E = 1/2 mV^2

400 = 1/2 x m x (20)^2

400 = 1/2 x m x 400

400 = m x 200

Divide both side by 200

m = 400/200

m = 2kg

The mass of the object is 2kg

the displacement produced by the body.  

the amount of force subjected to the body.  

the angle between the direction of force and displacement

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