A smooth plane inclined at an angle θ with the horizontal as shown in the given figure. A body starts from rest and slides down on the inclined surface. The time taken by the body to reach the bottom is
A. $$\frac{{\sqrt {2h} }}{g}$$
B. $$\sqrt {\frac{{2l}}{g}} $$
C. $$\frac{1}{{\sin \theta }}\sqrt {\frac{{2h}}{g}} $$
D. $$\sin \theta \frac{{\sqrt {2h} }}{g}$$
Answer: Option C
This Question Belongs to Physics GK Chapter Wise >> Gravitational Force
The movement of the Moon around the Earth is due to . . . . . . . .
A. Gravitational force
B. Centrifugal force
C. Concentric force
D. Nuclear force
Which one of the following statements about a satellite orbiting around the earth is correct?
A. Satellite is kept in orbit by remote control from ground station
B. Satellite is kept in orbit by retro-rocket and solar energy keeps it moving around the earth
C. Satellite requires energy from solar panels and solid fuels for orbiting
D. Satellite does not required any energy for orbiting
What will happen if an object is thrown into space with the speed of 8 km/s?
A. The object will go into space
B. It will return to Earth
C. It will rotate into the orbit of Earth
D. It will burst out
Astronauts feel . . . . . . . . weight inside the spacecraft.
A. more
B. less
C. zero
D. depends on G force
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