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1. Gravitation is the force of attraction between
A. two charged bodies
B. two magnetic poles
C. two masses
D. two moving bodies
2. The force that keeps the moon in its orbit around the earth is
A. frictional force
B. gravitational force
C. muscular force
D. magnetic force
3. The universal law of gravitation states that every object attracts every other object with a force that is
A. proportional to the sum of their masses
B. proportional to the product of their masses
C. proportional to the square of their masses
D. independent of their masses
6. The value of g is greater at
A. the equator
B. the poles
C. both are same
D. centre of the earth
7. The motion of a freely falling object is called
A. uniform motion
B. accelerated motion
C. free fall
D. projectile motion
8. The acceleration produced in a freely falling object is
A. constant for all objects
B. different for different masses
C. zero
D. infinite
9. The relationship between force and acceleration is given by
A. F = m/a
B. F = m + a
C. F = m × a
D. F = a/m
10. The acceleration due to gravity is denoted by
A. G
B. f
C. g
D. w
11. The formula for weight is
A. W = m/a
B. W = m × g
C. W = g/m
D. W = g + m
12. The SI unit of weight is
A. kilogram
B. dyne
C. joule
D. newton
13. The weight of an object is a
A. scalar quantity
B. vector quantity
C. constant quantity
D. unitless quantity
14. The mass of an object remains
A. variable on different planets
B. constant everywhere
C. half on the moon
D. zero in space
15. Weight depends on
A. only mass
B. only acceleration due to gravity
C. both mass and acceleration due to gravity
D. volume
16. The mass of the moon is ______ times that of the earth.
A. 1/6
B. 1/50
C. 1/80
D. 1/100
18. The gravitational constant (G) has the unit
A. N m² kg⁻²
B. N m kg⁻²
C. N kg⁻¹
D. N m⁻²
19. The weight of an object on the moon is equal to
A. its weight on earth
B. twice its weight on earth
C. one-sixth of its weight on earth
D. one-third of its weight on earth
20. An object weighs 60 N on earth. Its weight on the moon will be
A. 60 N
B. 10 N
C. 6 N
D. 360 N
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