Question

Груз массой m = 200г , подвешенный к пружине динамометра, опускают в воду. Определите показания динамометра после того, как груз полностью погрузился в воду , если выталкивающая сила, действующая на груз, F = 1.3 H

Answer 1

Показание динамометра в воздухе F1=m*g=0,2*10=2 Н
В воде  F2=F1-Fa=2-1,3=0,7 H

Answer 2

Calculation of the Dynamometer Reading

To calculate the reading on the dynamometer after the mass is fully submerged in water, we can use the following formula:

F = m * g

Where: - F is the buoyant force acting on the mass, - m is the mass of the object, and - g is the acceleration due to gravity.

Given: - m = 200g (0.2 kg), - F = 1.3 N.

We can use the formula to find the dynamometer reading after the mass is fully submerged in water.

Calculation

Using the formula F = m * g, we can solve for g: g = F / m

Substitute the given values: g = 1.3 N / 0.2 kg g = 6.5 m/s^2

So, the acceleration due to gravity is 6.5 m/s^2.

Conclusion

After the mass is fully submerged in water, the dynamometer reading will be 1.3 N.