A toy truck has a speed of 3 m/s and kinetic of 36 J what is its mass?

8kg

Explanation:

Kinetic energy = 1/2 mv^2

Where

M = mass

V = speed or velocity

Given

Kinetic energy = 36

V = 3m/s

Therefore

36 = 1/2 x m x 3^2

36 = 1/2 x m x 3 x 3

Multiply through

36 = m x 9 /2

Cross multiply

36 x 2 = m x 9

72 = m x 9

Divide both sides by 9

72/9 = m x 9/9

8 = m

m = 8kg

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