Refer to the diagram shown below.
The tension, T, in each cable is the same because of vertical symmetry.
For vertical equilibrium,
2T sin(24°) = 400 N
0.8135 T = 400
T = 491.7 N
Answer: 491.7 N
Answer:
Explanation:
At height h , potential energy of coaster car having mass m = mgh .
The car will lose potential energy and gain kinetic energy.
height lost by car when it is at the top of loop of radius R
= h - 2R
potential energy lost = mg ( h - 2R )
kinetic energy gained = mg ( h - 2R )
kinetic energy = 0 + mg ( h - 2R )
= mg ( h - 2R )
b )
For the car to remain in contact with the track , if v be the minimum velocity
centripetal force at top = mg
m v² / R = mg
v² = gR
kinetic energy = 1/2 mv²
= 1/2 m x gR
= mgR /
If h be the minimum height that can give this kinetic energy
mg ( h - 2R ) = mgR / 2
h - 2R = R / 2
h = 2.5 R .
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The correct answer is option A. 1/4 times
This is because distance and force are inversely proportional
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Gravity ALWAYS does that, and electrostatic force does it when two objects have opposite charges.