A ball is tied to the end of a 100cm long string. If it has enough speed at the bottom, it will move in a circular path. What is the minimum speed needed at the bottom for the ball to get to the top of the circle?
A) 0.00m/s
B) 3.13m/s
C) 4.42m/s
D) 9.80m/s

A toy car travels down a track and through a loop of radius r. From what minimum initial height h does it need to be released so that it stays on the track through the loop?
A) h = 3r/2
B) h = 3r
C) h = 5r/2
D) h = 2r

Question

A ball is tied to the end of a 100cm long string. If it has enough speed at the bottom, it will move in a circular path. What is the minimum speed needed at the bottom for the ball to get to the top of the circle?
A) 0.00m/s 
B) 3.13m/s 
C) 4.42m/s 
D) 9.80m/s

A toy car travels down a track and through a loop of radius r. From what minimum initial height h does it need to be released so that it stays on the track through the loop?
A) h = 3r/2 
B) h = 3r 
C) h = 5r/2 
D) h = 2r

mos1635 · Answer

|dw:1333701383364:dw|
in hight point sum force must = centerpalant
tension T greater than 0
min value=0
there for minimume V2=.........
conservation of energy mill give you V1