A force of 5 N acted on the body for 10 s. Determine the body mass if, as a result, it changed its speed by 0.5 m / s.

univerkov | November 27, 2020 | education

Condition:
V = 0.5 m / s.
t = 10 s.
F = 5 N.
To find :
m-? kg.
Decision :
V = V0 + a * t.
V = a * t. (since V0 = 0 m / s.). :
a = V / t.
[a] = m / s / s = m / s ^ 2.
a = 0.5 / 10 = 0.05 (m / s ^ 2).
F = m * a – (2 Newton’s law).
m = F / a.
[m] = N / m / s ^ 2 = kg.
m = 5 / 0.05 = 100 (kg).
Answer: 100 kg.

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