The equation for the speed of the body has the form V = 10 + 5t. Determine the body mass if it is known

The equation for the speed of the body has the form V = 10 + 5t. Determine the body mass if it is known that the resulting external forces is 15 H

Condition:
F = 15 N.
V = 10 + 5t.
To find :
m-? kg.
Decision :
From the equation of motion of the body speed:
V = 10 + 5t.
Let’s express the acceleration:
a = 5 m / s ^ 2.
F = ma – (2 Newton’s law).
m = F / a
[m] = N / m / s ^ 2 = kg.
m = 15/5 = 3 (kg).
Answer: 3 kg.