Under the action of a constant force of 30 n, the speed of the stone in 0.5 s increased from 0 to 15 meters per second

| November 19, 2020 | education

Under the action of a constant force of 30 n, the speed of the stone in 0.5 s increased from 0 to 15 meters per second, calculate the mass of the stone. Search only: under the action of a constant force of 30n, the speed of the stone in 0.5s increased from 0 to 15 meters per second, calculate the mass of the stone.

F = 30 N.
t = 0.5 s.
V0 = 0 m / s.
V = 15 m / s.
m -?
Let us write 2 Newton’s law: F = m * a, where F is the force that acts on the body, m is the mass of the body, a is the acceleration of the body under the action of the force.
Let’s write the formula for the acceleration of the body: a = (V – V0) / t.
F = m * (V – V0) / t.
Body weight will be determined by the formula: m = F * t / (V – V0).
m = 30 N * 0.5 s / (15 m / s – 0 m / s) = 1 kg.
Answer: the mass of the stone is m = 1 kg.



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