Physics
A sphere rolls down on two inclined planes of different angles but same height, it does so

With the same speed
In the same time with the same speed
In the same time
In the same time with the same kinetic energy

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Physics
The sensation of weightlessness in a spacecraft in an orbit is due to the

Presence of gravity outside but not inside the spacecraft
Acceleration in the orbit which is equal to the acceleration due to gravity outside
Fact that spacecraft in the orbit has no energy
Absence of gravity outside

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