A rollercoaster moves from the bottom of a hill and approaches the top of the hill. If friction between the wheels and the track
1 answer:
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Answer:C
Explanation:
Given
mass is at
mark
mass is at
mark
Scale is Pivoted at
For scale to be in equilibrium net torque must be equal to zero
Taking ACW as positive thus
Therefore a net torque of 0.04 g is required in CW sense which a mass can provide at a distance of
from pivot
therefore in meter stick it is at a distance of
Answer:
Explanation:
Case I: They have same charge.
Charge on each sphere = q
Distance between them, d = 14.8 cm = 0.148 m
Repulsive force, F = 0.235 N
Use Coulomb's law in electrostatics
By substituting the values
Thus, the charge on each sphere is .
Case II:
Charge on first sphere = 4q
Charge on second sphere = q
distance between them, d = 0.148 m
Force between them, F = 0.235 N
Use Coulomb's law in electrostatics
By substituting the values
Thus, the charge on second sphere is and the charge on first sphere is
.