Which action results from the combination of gravity and inertia working on the moon
2 answers:
Answer:
Revolution of moon around the earth
Explanation:
The revolution of moon around the earth.
The gravitational force acting on the moon is balanced by the centripetal force acting on the moon.
Gravitational force of earth on moon is given by
where, M be the mass of earth, m be the mass of moon and r be the distance between moon and earth.
The centripetal force acting on moon is
These two forces balance each other and then the moon revolves around the earth in fixed orbit.
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Answer:
The energy stored in the capacitor quadruples its original value.
Explanation:
The energy stored in a capacitor is given by the equation
where
C is the capacitance
V is the voltage across the plates
The capacitance, C, depends only on the properties of the capacitor, so it does not change when the voltage applied is changed.
Instead, in this problem the voltage applied is doubled:
V' = 2V
So the new energy stored is
so, the energy stored has quadrupled.
Missing question: "how much work is done by the teacher?" (found on internet)
Solution:
The work done to move the desk across the floor is equal to
where F is the horizontal force applied to move the desk, and d is the distance covered by the desk. If we use F=20 N and d=5 m, we find the work done:
Solution:
The work done to move the desk across the floor is equal to
where F is the horizontal force applied to move the desk, and d is the distance covered by the desk. If we use F=20 N and d=5 m, we find the work done: