The known forces of nature can be divided into four classes, viz., gravity, electromagnetism, weak nuclear force and strong nuclear force. With reference to them which one of the following statements is not correct?
A. Gravity is the strongest of the four
B. Electromagnetism acts only on particles with an electric charge
C. Weak nuclear force causes, radioactivity
D. Strong nuclear force holds protons and neutrons inside the nucleus of an atom
Answer: Option A
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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