The kinetic energy of the pendulum bob in figure 15-1 increases the most between locations
2 answers:
Answer:
A and C
Explanation:
Kinetic energy of a body is given by the expression, , where v is the velocity and m is the mass of body.
In case of a simple pendulum the maximum velocity is at it's stationary position.
So maximum velocity i at position C, which means maximum kinetic energy is at position A.
The velocity of pendulum reduces as the angle between vertical stationary and current position increases.
So, velocity at E and A are the minimum, so at A and E the kinetic energy value is minimum.
Now examining the options given, we will understand the kinetic energy increase is maximum in case of A and C.
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Answer:
Explanation:
When the central shaft rotates , the seat along with passenger also rotates . Their rotation requires a centripetal force of mw²R where m is mass of the passenger and w is the angular velocity and R is radius of the circle in which the passenger rotates.
This force is provided by a component of T , the tension in the rope from which the passenger hangs . If θ be the angle the rope makes with horizontal ,
T cos θ will provide the centripetal force . So
Tcosθ = mw²R
Tsinθ component will balance the weight .
Tsinθ = mg
Dividing the two equation
Tanθ =
Hence for a given w , θ depends upon g or weight .