Torque and angular acceleration of a ring and bar combination.

A uniform thin ring, mass M= 6 kg and radius R= .35 m, with a bar of mass m= 4.5 kg across its diameter, is mounted on frictionless bearings at its center. A cord wrapped on the surface of the ring suspends a weight W= 14.7 nt. See ATTACHMENT1 for a diagram showing parameters and stating physics required.

A spring and its force constant

A spring whose force constant k= 84 nt/m is suspended by one end from a support. The unstressed spring's length is .66 m. Find the length of the spring when a mass of M= 12 kg is suspended from the lower end, in equilibrium.

Two springs are to be stretched and ends joined. Find each elongation and each potential energy.

Spring S has a relaxed length of s= .85 m and has a force constant ks= 24 nt/m. Spring P has a relaxed length p= .45 m and has a force constant ks= 60 nt/m. Initially, each spring has one end attached to opposite sides of a box so that the distance between their free ends is d= .70 m apart. Their ends are pulled toward each ot ...continues

Vector polygon to solve for the forces on a block in equilibrium on a plane.

A block whose weight is W= 250 nt is on a frictionless plane which is at angle q= 25 degrees. A cable between the ceiling and the block makes an angle q=55 degrees from the ceiling. See ATTACHMENT1 for a diagram with given parameters, angles, physics statements, and a polygon created from known information. Also an illustration ...continues

Vector solution of a ring in equilibrium with three acting forces.

A small ring is held stationary with three forces, A, B and C acting on it. Force A= 85 nt /20 , Force B= 160 nt /150 . Angles are in degrees relative to the +x axis being 0. Find the magnitude and direction of Force C.

A rock falls from the top of a building, passing a window in a known time. Find the height of the building.

A rock is released at rest from the top of a building. A window of the building which measures d=3.5 m from top to bottom. Its bottom edge is distance h=36 m from the ground. The rock takes time T= .12 seconds to pass from the top to the bottom of the window. a. find the height of the building. b. find the time the rock takes ...continues

Weight difference on a spring scale in Mexico vs Alaska

This problem is in a chapter titled Rotational Motion (inertia, torque, center of gravity, stability, centripetal force, centrifugal force, simulated gravity, & angular momentum) Please answer the question using these types of ideas. It is a conceptual question that needs a detailed explanation. 26) If you should buy a q ...continues

Centripetal Force & Work

Does a centripetal force that acts on an object rotating in a circular path do work on an object? What is your explanation, and what evidence can you cite to support your answer?

conservation of angular momentum

A sizeable quantity of earth is washed down the mississippi river and deposited in the gulf of mexico. what effect does this tend to have on the length of a day?

flotation and water displacement

A rectangular barge, 5m long and 2m wide, floats in fresh water. Suppose it can be pushed only 15cm deeper before water overflows to sink it. Determine the number of 400-kg horses it can carry. ~this is a problem found in a conceptual physics book so no need to get to mathmatical.