A force of 4.9 N acted on the body for 10 s. Find the mass of the body if the change in speed
| January 25, 2021 | education
A force of 4.9 N acted on the body for 10 s. Find the mass of the body if the change in speed as a result of the action of the force was 5 m / s.
t = 10 s.
F = 4.9 N.
ΔV = 5 m / s.
m -?
According to 2 Newton’s law, the mass of a body m can be found by dividing the force F, which acts on the body, by the acceleration that this force imparts to it: m = F / a.
The acceleration of a body is a vector physical quantity that shows how the body’s velocity ΔV changes over time t and is determined by the formula: a = ΔV / t.
The formula for determining body weight m will take the form: m = F * t / ΔV.
m = 4.9 N * 10 s / 5 m / s = 9.8 kg.
Answer: the body has a mass m = 9.8 kg.
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