A boy weighing 40 kg, standing on skates on the ice, throws a load forward at a speed of 2 m / s. Find the mass of this weight
| November 20, 2020 | education
A boy weighing 40 kg, standing on skates on the ice, throws a load forward at a speed of 2 m / s. Find the mass of this weight if, at the moment of the throw, the boy rolled back at a speed of 80 cm / s.
The speeds acquired by bodies during interaction are inversely proportional to their mass
V1 / V2 = m2 / m1;
m2 = 0.8 * 40/2 = 16 kg;
Answer: 16 kg
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