Abead slides without friction around a loop the-loop. the bead is released from a height of 24.5 m from the bottom of the loop-the loop which has a radius 9 m. the acceleration of gravity is 9.8 m/s².
what is its speed at point a?
answer in units of m/s.

Explanation:

given,

bead is released from the height = 24.5 m from bottom

radius of the loop = 9 m

acceleration due to gravity = 9.8 m/s

A be the top most point of the loop

Difference of elevation from the top

     H = 24.5 - 2 x r

     H = 24.5 - 2 x 9

     H = 24.5 - 18

     H = 6.5 m

now using conservation of energy

   KE = PE

speed at point A is equal to  

d is the correct answer

the temperature in kelvin of 2.0 dm3 of an ideal gas is doubled and its pressure is increased by a factor of four. what is the final volume of the gas