centasts x A college physics Chapte x Y using coefficient of kinet x Q Google Do
ID: 1556703 • Letter: C
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centasts x A college physics Chapte x Y using coefficient of kinet x Q Google Does te an x Resume Google Docs x Secure I https//www.webassignne nment ResponsesMast?dep 15929984 t/web/Student/Assig 011 points. Previous Answers CJ10 5.PO58 My Notes O Ask Your Teacl The large blade of a helicopter is rotating in a horizontal circle. The length of the blade is 7.1 m, measured from its tip to the center of the circle. Find the ratio of the centripetal acceleration a1 at the end of the blade to the centripetal acceleration a2 which exists at a point located 2.3 m from the center of the circle. a1/a2 1.54 My Notes Ask Your Teacl 18. 011 points I Previous Answers CJ10 5.P059 34 m/s, the block A block is hung by a string from the inside roof of a van. When the van goes straight ahead at a speed of m), the block hangs vertically down. But when the van maintains this same speed around an unbanked curve (radius swings toward the outside of the curve. Then the string makes an angle with the vertical. Find 0. 1.54Explanation / Answer
Given
the blade of helicopter of length is r1 = 7.1 m,
and the other location ais r2 = 2.3 m
considereing the circle of radius r2 and r1
we know that the centripetal acceleration is a_c = v^2/r
nwo the ratio of centripetal acceleration with radius r1,r2 is a1/a2
a1 = v^2/r1 , a2 = v^2/r2
a1/a2 = (v^2/r1)/(v^2/r2)
= r2/r1
= 2.3/7.1
= 0.323944
18
given speed of the van is v = 34 m/s
and a block hangs vertically down inside of the van from ceiling
as long as the van moves straight line with constant speed the block will continue in the same direction hanging vertically .
if there is any change in speed or in the direction of the motion of van with respect to straight line , then it would either inward or outward that depends on the direction of the motion of the van
for example if the van makes turn to the inside ( left ) of a curve then the block will move to the opposite direction to the motion of the van that is it will move to the right side due to inertia
the block continues to move straight , but the van moving to left ,resulting due to inertia
the banking angle is Tan theta v^2/rg
given v = 34 m/s, r = 180 m
tan theta = 34^2/(180*9.8)
theta = arc tan (34^2/(180*9.8))
= 33.24 degrees with verticle
if the string makes 33.24 degree outside of the curve then the van is moving inward (left).
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