Recent content by inv4lid

A ball of 100g, suspended from a pulley of a dynamometer, oscillates freely. The length of the pendulum thus obtained is 1m. What are the indications of the dynamometer when the ball is at the point A of it's trajectory? The maximum offset angle is 15 degrees. Homework Equations α - alpha...

I need to get some numbers. How would i get the tension/acceleration? There is too much unknown data. (i guess we can't get any of T)

Homework Statement Determine bodies' acceleration if their masses are the following: m1 = 25kg, m2 = 1kg, m3 = 3kg and the Tension of the ropes. Friction is neglected, as well as the mass of the pulley. It is considered that the ropes are perfect. m1 = 25kg; m2=1kg; m3=3kg; ___________ a=...

I just tried to draw same thing that's on wiki. My img can possibly be imprecise, as i don't really get what is the line mg*cosA represents... Yes.

Homework Statement On a plane tilted at the angle of 30 degrees with the horizon lies an object, whose weight is equal to 1.4 kg. The coefficient of friction between the object and the plane is equal to 0.2. Find acceleration. m = 1,4kg; (weight) Angle (A) = 30 degrees. COF µ = 0,2 Ff -...

It was 0, yes, i know. I got some answers between 1,7 and 2,8 seconds. By the way, the end of the book says the true answer is 6s The problem also belongs to the category of "simple problems", so I think the solution shouldn't be so difficult. Usually, the problems of this category are solved in...

Homework Statement A body that is on a horizontal surface begins to move under the action of horizontal force equal to 60% of its weight. Force acts for a while, then stops acting. Determine the total time of movement if the body has traveled a distance of 24m. Homework Equations [/B] I'm...

Okay. Ty for everything, going to solve it.

Okay. m1g = k(x1-x0) m1g = k(x2-x0) -> 10 = k(5-x0) 10 = k(15-x0) that's though quite non-sense

A question there: why do we need m2 there if it doesn't influence the object?

What is x? I assume it's a different writing form of ΔL? Ok. Sorry, but i have already tried that above. mg (which is 10N) = kx, where both k & x are unknown

10 N = kΔL? ΔL1 = L1 - L0 from there L0 = -ΔL1+L1 -> L0 = -ΔL1+5 ΔL2 = L2-L0 from there L0 = -ΔL2+L2 -> L0 = -ΔL2+15 Quite still don't get it.

Homework Statement two linked are attached to each other with a spring. If the second body is placed on a fixed support, the length of the spring is 5 cm. If we fix the first body as in the picture, the length of the spring becomes 15cm. Determine the length of the spring in the non-deformed...

Just got it, ty anyway

Homework Statement A rocket during launch from the Earth's surface moves vertically with an acceleration of 22m / s ^ 2. Find the cosmonaut's weight inside the cabin if his mass is 90kg. Homework Equations The problem belongs to "Elasticity. Moving under the action of elastic force" chapter...