Newtowns 1st and 2nd laws question.

  • Thread starter Thread starter jovankamcev24
  • Start date Start date
  • Tags Tags
    Laws
AI Thread Summary
In the discussion regarding Newton's first and second laws, participants analyze various force combinations applied to an object to determine conditions for maintaining a constant velocity of 256 m/s. The key point is that an object will move at a constant velocity only when the net force acting on it is zero. Several force combinations are examined, with particular attention given to the third case of 200 N and 201 N, where the forces are unbalanced, resulting in acceleration rather than constant velocity. The conversation encourages participants to show their reasoning and calculations for each scenario. Understanding these principles is essential for applying Newton's laws effectively in physics problems.
jovankamcev24
Messages
1
Reaction score
0
In an inertial frame of reference, a series of experiments is conducted. In each experiment, two or three forces are applied to an object. The magnitudes of these forces are given. No other forces are acting on the object. In which cases may the object possibly move at a constant velocity of 256m/s?

The forces applied are as follows:
2 N; 2 N
200 N; 200 N
200 N; 201 N
2 N; 2 N; 4 N
2 N; 2 N; 2 N
2 N; 2 N; 3 N
2 N; 2 N; 5 N
200 N; 200 N; 5 N
 
Physics news on Phys.org
good question. sounds like homework.

show some work... at least some attempt, however small.

for example, the third case 200;201. What do you think for that one? And why?
 
TL;DR Summary: I came across this question from a Sri Lankan A-level textbook. Question - An ice cube with a length of 10 cm is immersed in water at 0 °C. An observer observes the ice cube from the water, and it seems to be 7.75 cm long. If the refractive index of water is 4/3, find the height of the ice cube immersed in the water. I could not understand how the apparent height of the ice cube in the water depends on the height of the ice cube immersed in the water. Does anyone have an...
Thread 'Variable mass system : water sprayed into a moving container'
Starting with the mass considerations #m(t)# is mass of water #M_{c}# mass of container and #M(t)# mass of total system $$M(t) = M_{C} + m(t)$$ $$\Rightarrow \frac{dM(t)}{dt} = \frac{dm(t)}{dt}$$ $$P_i = Mv + u \, dm$$ $$P_f = (M + dm)(v + dv)$$ $$\Delta P = M \, dv + (v - u) \, dm$$ $$F = \frac{dP}{dt} = M \frac{dv}{dt} + (v - u) \frac{dm}{dt}$$ $$F = u \frac{dm}{dt} = \rho A u^2$$ from conservation of momentum , the cannon recoils with the same force which it applies. $$\quad \frac{dm}{dt}...
Back
Top