maxjo700 maxjo700

04-11-2022
Physics

Answered

you are testing a new roller coaster ride in which a car of mass m moves around a vertical circle of radius r . in one test, the car starts at the bottom of the circle (point a) with initial kinetic energy ki . when the car reaches the top of the circle (point b), its kinetic energy is ki/4 , and its gravitational potential energy has increased by ki/2 . what was the speed of the car at point a, in terms of g and r ?

Answer :

Other Questions

one end of a 1.0-m long string is fixed, the other end is attached to a 2.0-kg stone. the stone swings in a vertical circle, passing the top point at 4.0 m/s. t

A particle moves in a circle with radius 10 cm and with a uniform speed 1. 3 m/s. What is the centripetal acceleration of this particle?.

a roller coaster starts at rest from the top of a hill, coasts down, and then does a loop-the-loop of radius 12 mm . if the riders should feel weightless just a

a uniform hoop (ring) of mass m and radius r is rolling without slipping on a horizontal ground with its center having velocity 'v'. find the kinetic energy of

a spherical conductor of radius 0.330 m has a spherical cavity of radius 0.120 m at its center. the conductor carries a total charge of -6.00 nc ; in addition,

a gas is compressed and during this process the surroundings do 130 j of work on the gas. at the same time, the gas absorbs 140 j of heat from the surroundings.

2. a potential difference of 12 v is found to produces a current of 0.40 a in 3.2 m length of wire of radius 0.40 cm. what is the total resistance and resistanc