Complete Question
The cars of a roller-coaster ride have a speed of 19.0 km/h as they pass over the top of the circular track. Neglect any friction and calculate their speed v when they reach the horizontal bottom position. At the top position, the radius of the circular path of their mass centers is 21 m, and all six cars have the same mass.V = -18 m What is v?X km/h
Answer:

Explanation:
Velocity 
Radius 
initial velocity u
Generally the equation for Angle is mathematically given by




Generally
Height of mass



Generally the equation for Work Energy is mathematically given by

Therefore



I’m not that shareholding about it but I think the answer is C mark it green I hope I don’t get it rong
If there is a random child, you should ask where they should be and where their parents went. if it your child, they prolly want food or sum.
Explanation:
Note: Refer the diagram attached
Apply KVL around
loop


Answer:
Actualmente estoy trabajando en una pregunta diferente en este momento.
Actualmente estoy trabajando en una pregunta diferente en este momento.
Explanation:
Actualmente estoy trabajando en una pregunta diferente en este momento.