John decided to cycle to his friend's house at a speed of 5km/h and the journey took 2
2 answers:
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Answer:
t = 5.89 s
Explanation:
To calculate the time, we need the radius of the pulley and the radius of the sphere which was not given in the question.
Let us assume that the radius of the pulley () = 0.4 m
Let the radius of the sphere (r) = 0.5 m
w = angular speed = 150 rev/min = (150 × 2π / 60) rad/s = 15.708 rad/s
Tension (T) = 20 N
mass (m) = 3 kg each
Substituting values:
Answer:3.49 m/s
Explanation:
Given
Speed of marble at Bottom
Diameter of loop
As Energy is conserved therefore Energy at top is equal to energy at bottom
,where
is the velocity at bottom