||Who among the following anticipated Newton by declaring that all things gravitate to the earth?
||Who gave the theory of gravity?
||Who propounded the universal law of gravitation?
||Astronauts in space can not stand erect. This is because in space –
||There is no gravity
||If an apple is released from an orbiting spaceship, it will –
||Move along with the spaceship at the same speed
||The Leaning Tower of Pisa does not fall because –
||The vertical line through the center of gravity of the tower falls within its base
||If the distance between the Earth and the Sun were twice what it is now, the gravitational force exerted on the Earth by the Sun would be –
||One-fourth of what it is now
||If an object is falling from above, its weight remains –
||If pieces of equal size of wood, wax, and iron fall from the same height, which one will reach the surface of the earth first?
||Reach at the same time
||The two balls of iron and wood of the same weight dropped from the same height in air, then –
||The wooden ball falls later.
||The weight of human body is –
||Maximum at the poles.
||A ball is dropped from the top of a high building with a constant acceleration of 9.8 m/s². What will be its velocity after 3 seconds?
||If the radius of the earth were to shrink by one percent, its mass remaining the same, the value of g on the earth’s surface would –
||Increase by 2%
||The acceleration due to the gravity of a destructive earthquake will be –
||> 980 cm/sec²
||The mass of a body on the Earth is 100 kg (acceleration due to gravity, ge= 10m/s2 ). If acceleration due to gravity on the Moon is ( ge/6), then the mass of the body on the Moon is –
||Weightlessness is –
||The Earth travels in its orbit at a speed of approx 4,400 km per hour. Why do we not feel this high speed?
||Our relative speed with respect to the Earth along the Earth’s orbit is zero.
||An artificial satellite orbiting around the Earth does not fall down. This is so because the attraction of Earth –
||Provides the necessary acceleration for its motion
||Satellite is kept moving in its orbit around the Earth; it is due to –
||A Geosynchronous satellite continuously active in its orbit due to centripetal force which is obtained by –
||The gravitational force on the satellite by the earth.
||If a person sitting in a lift then when will he feel that his weight gets increased?
||When the elevator going upward expeditiously
||The time period of a pendulum –
||Depends on its length
||Why do pendulum clocks usually lose time in summer?
||The length of the pendulum increases, increasing the time period of unit oscillation.
||A girl is swinging on a swing in sitting position. When the girl stands up, the period of the swing will –
||A pendulum clock can run faster in –
||Earth’s escape velocity is –
||What will happen if an object is thrown into space with the speed of 8 km/sec.?
||It will return to earth
||There is no atmosphere on the moon because –
The escape velocity of gas molecules on it is less than the root mean square velocity here.
||In the state of weightlessness, the size of candle’s fame will be –