Multiple Choice Questions on Gravitation
Select the best possible option.
- Two masses are separated by a distance r. If both masses are doubled, the force of interaction between the two masses changes by a factor
A. 2 | B. 4 | C. 1/2 | D. 1/4 |
- The radius of earth rg is
A. 9.8 m | B. 6.67 × 10-11 m | C. 6 × 1024 m | D. 6.4 × 106 m |
- The SI unit for gravitational constant G is
A. N kg2 | B. N m2 kg-2 | C. N m2 kg2 | D. N m-2 kg2 |
- What is the mass on planet mercury of an object that weighs 784 N on the earth’s surface?
A. 80.0 kg | B. 118 | C. 784 kg | D. More information needed |
- An object is orbiting a planet with orbital speed v. If the radius is same and the mass in increased 4 times, by what factor orbital speed will change?
A. 2 | B. 4 | C. 1/2 | D. 1/4 |
- The value of g at the surface of the moon is
A. 9.8 ms-2 | B. 1.63 ms-2 | C. 4.9 ms-2 | D. 8.9 ms-2 |
- The value of g —————— with altitude
A. increases | B. decreases | C. gets zero | D. remains the same |
- When a body is moved from the sea level to the top of a mountain, there is change in the body’s
A. mass | B. weight | C. none | D. both mass and weight |
- The value of g at equator is
A. same at poles | B. larger at poles | C. smaller at poles | D. none |