1.) Weight is given by
A ) ma
B ) mv2
C ) mg
D ) mv2r
Ans C ) mg
2) Potential energy increases with
A ) Height B ) Inertia C ) Velocity
D ) Momentum
Ans A ) Height
3) If mass of the object is 10 kg, its weight is
A ) 10 kg B ) 10 N C ) 9.8 N D ) 98 N
Ans D ) 98 N
4 ) If the distance is doubled, what happens to the gravitational force?
A ) Becomes half B ) Increases by 2 C ) Increases by 4 D ) Decreases by 4
Ans D ) Decreases by 4
5 ) Application of force leads to change in
A ) Gravity B ) Motion C ) Weight
D ) Temperature.
Ans B ) Motion
6) In a free fall, initial velocity is
A ) Highest
B ) Lowest
C ) 0
D ) Infinity
Ans C ) 0
7) How many focal points an elipse has?
A ) 0
B ) 1
C ) 2
D ) 4
Ans C ) 2
8 ) If object is freely falling at velocity 98 m/s, then time taken to reach ground will be
A ) 9.8s
B ) 98s
C ) 1s
D ) 10s
Ans D ) 10s
9 ) If T1 is time required for travelling distance R1 and T2 for R2, then using Kepler’s third law. What can be concluded?
A ) T1R1 = T2 R2
B )T1 2R13 =T12 R23
C ) T1 2 R2 = T2 2 R1
D ) T1 2 R 23 = T 2 2
Ans: D ) T1 2 R 23 = T 2 2
10 ) Force between any two objects of mass m1 and m2 placed at distance d is given by
A )F = G m1m2/d
B ) F = m1m2/ Gd1
C ) F = G m1m2/d2
D ) F = Gm1 2m 2 2 / d2
Ans: C )
12 ) S.I unit of g is
A ) m/s
B ) m/s2
C ) kgm/s2
D ) N
Ans B ) m/s2
13) Kepler’s first law explains
A ) Elliptical orbit of a planet
B ) Gravitational force between objects
C ) Area covered by a planet
D ) Time taken by planet for revolution
Ans A ) Elliptical orbit of a planet
14 ) Point where total mass of any object is assumed to be concentrated is
A ) Centre of mass
B ) Centroid
C ) Mass concentration
D ) Mass point of object
Ans A ) Centre of mass
15) Value of g increases as weight of object increases.
A ) True; g α mass of the object False; g α 1
B )mass of object
C ) False; g depends on weight
D ) False ; g does not depend on mass.
Ans D ) False ; g does not depend on mass.
16 ) Velocity of any object in circular motion is in direction.
A ) Tangential B ) Radial C ) Parallel D ) Vertical
Ans A ) Tangential
17 ) Gravitational acceleration is denoted by
A ) G
B ) g
C ) Ag
D ) ga
Ans B ) g
18 ) Kepler’s laws do not explain
A ) Elliptical orbit
B ) Area covered by planet
C ) Gravitational force
D ) Time taken by planet
Ans C ) Gravitational force
19. ) The energy stored in object due to its position or state is
A ) Kinetic energy
B ) Gravitational energy
C ) Potential energy
D ) Electrical energy
Ans C ) Potential energy
20 ) As we go inside the earth, r decreases. The value of g
A ) Increases
B ) Decreases
C ) Remains same
D ) Becomes 0
Ans B ) Decreases
21 ) If M = 3M and R = 3R, then g
A ) Increases by 3 B ) Decreases by 9 C ) Increases by 1/3
D ) Decreases by 3
Ans D ) Decreases by 3
22 ) The line joining the planet and the Sun sweep equal areas in equal time. This is ……………
A ) Newton’s first law
B ) Kepler’s first law
C ) Newton’s second law
D ) Kepler’s second law Ans D ) Kepler’s second law
22 ) Pick out an odd option
A ) Mass
B ) Weight
C ) Radial distance
D ) Gravitational acceleration
Ans A ) Mass
23 ) Value of g increases with altitude increase.
A ) True, it depends on the distance directly.
B ) True, it depends on the mass directly.
C ) False, it depends on the distance directly.
D ) False, it depends on the distance inversely.
Ans D ) False, it depends on the distance inversely.
24 ) If height is doubled and mass is halved, the potential energy
A ) Increases
B ) Decreases
C ) Remains same
D ) Becomes 1/2
Ans C ) Remains same
25 ) Objects are pulled downwards towards earth due to phenemenon of …………….
A ) Magnetation
B ) Gravitation
C ) Centre of Mass
D ) Revolution and Rotation
Ans B ) Gravitation
26 ) SI unit of G is
A ) Nm2 kg-2 B ) Nm kg-1 C ) N2m2 kg2 D ) N m/s2
Ans A ) Nm2 kg-2
27 ) If F is centripetal force and m is the mass of any planet then A ) F α 1/m B ) F α m2 C ) F α m D ) F α m3
Ans C ) F α m
28 ) If velocity is equal to time taken (T), then Radius (R) will be equal to
A ) T2/ 2π
B ) 2T/ T2
C ) T/ απ
D ) 2πT/ √T
Ans: A ) T2/ 2π
29 ) Average value of g is
A ) 9.8 N
B ) 9.8 m/s C ) 0.98 m/s2 D ) 9.8 m/s2
Ans D ) 9.8 m/s2
30 ) The height at which a ball is thrown increases as
A ) Acceleration increases B ) Initial velocity increases C ) Final velocity increases D ) Uniformity increases
Ans B ) Initial velocity increases
31 ) Lowest value of g: equator : : Highest value of g : ?
A ) Tropical region
B ) Polar region
C ) Temperate zone
D ) Elevated regions
Ans B ) Polar region
32 ) Kepler stated the laws describing ……………
A ) Circular motion B ) Planetary motion C ) Uniform motion D ) Solar motion
Ans B ) Planetary motion
33 ) In circular motion, object experiences centripetal force.
A ) False, it is experienced in uniform motion
B ) False, in circulare motion only gravity acts
C ) True, it is radially acting towards centre
D ) True, centripetal force is tangential
Ans C ) True, it is radially acting towards centre
34 ) Pick odd option out:
A ) Gravitational Force
B ) Centripetal Force
C ) Gravitational constant
D ) Weight of the object
Ans C ) Gravitational constant
35 ) Pick out an odd option:
A ) Grams
B ) Newton
C ) Centimetres
D ) Dyne
Ans B ) Newton
36 ) Force is equal to G when unit masses are placed at unit distance.
A ) False (distance must not be unit)
B )True (F = G d/m1m2 )
C ) False (F = Gm1m2/d2 )
Ans
False (F = Gm1m2 )
C ) True (F = Gm1m2/d2 )
D ) True (F = G m1m2 / d2 )
Ans : D )
37 ) of am object is constant all along the universe.
A ) Mass B ) Weight C ) Gravity D ) Momentum
Ans A ) Mass
38 ) CGS unit of G is
A ) dyne cm2 g-2
B ) dyne m g-1
C ) dyne2 cm2 g2
D ) N cm2 g– 2
Ans A ) dyne cm2 g-2
39 ) Which of the following is a vector quantity?
A ) Speed
B ) Time
C ) Distance
D ) Velocity
Ans D ) Velocity
40 ) If R is the radius of the orbit, distance travelled in one revolution will be
A ) πR2
B ) 2πR
C ) 2πR2
D ) 2π / R
Ans B ) 2πR
41) Light is a type of
A ) Electromagnetic wave
B ) Radio wave
C ) Visible wave
D ) Gravitational wave
Ans A ) Electromagnetic wave
42 ) With uniform density, centre of mass is at
A ) Edge B ) Corner C ) Vertice
D ) Centroid
Ans D ) Centroid
43 ) is necessary to change the speed as well as the direction of the motion of an object.
A ) Velocity B ) Inertia C ) Force D ) Gravity
Ans C ) Force
44 ) The third kinematical equation during free fall becomes
A ) v = u + gt
B ) v = gt
C ) s = 1/2 g t 2
D ) v2 = 2gs
Ans D ) v2 = 2gs
45 ) g is formulated as
A ) g = GM/R2
B ) g = GM2 / R3
M2
Ans
C ) g = M2 / GR3
D ) g = GM/R
g = GM
Ans: A )
46 ) The SI unit of potential energy is
A ) N B ) Kg m/s2 C ) Joules D ) Kg m2s2
Ans C ) Joules
47 ) Force acting on a body results in
A ) Inertia
B ) Acceleration
C ) Increase in temperature
D ) Increase in volume
Ans B ) Acceleration
48) If the mass of each object is doubled, the force between the two objects.
A ) Becomes half B ) Increases by 2 C ) Increases by 4 D ) Decreases by 4
Ans C ) Increases by 4
49 ) At infinite distance from earth, the total energy equals to
A ) Kinetic energy
B ) Potential energy
C ) Gravitational energy
D ) O
Ans D ) O
50 ) Initial velocity during free fall : 0 m/s : : Acceleration during free fall : ?
A ) 0 m/s2 B ) 9.8 m/s2 C ) 9.8 m/s D ) – 9.8 m/s2
Ans B ) 9.8 m/s2
51 ) Escape velocity is velociy
A ) Required to escape gravitational boundaries
B ) Required to escape the potential energy
C ) Required to escape kinetic energy
D ) Required to escape out of any motion
Ans A ) Required to escape gravitational boundaries
52) AB is the distance travelled in eight months by a planet and S is the position of Sun. Again it travels EF in next eight months. What can be concluded by this using Kepler’s law.
A ) AB = EF
B ) AB ≥EF
C ) Area ASB = Area ESF
D ) Area ASB ≥Area ESF
Ans C ) Area ASB = Area ESF
53 ) Free fall is only possible in
A ) Air
B ) Vacuum C ) Water D ) Oil
Ans B ) Vacuum
54 ) Third law of planetary motion is given as
A ) T2 α r3
B ) T2 = r3
C ) Equal areas
D ) T = r
Ans A ) T2 α r3
55 ) Sum of kinetic and potential energies is
A ) Minimal energy
B ) Total energy
C ) Gained energy
D ) Collective energy
Ans B ) Total energy
56 ) Force : dynes : : velocity (CGS units)
A ) m/s B ) cm/s C ) m/s2 D ) cm/s2
Ans B ) cm/s
57 ) ‘Centripetal’ means –
A ) Circular
B ) Centre seeking
C ) Centre philic
D ) Centre phobic
Ans B ) Centre seeking
58) Object in free fall has negative acceleration.
A ) True, it is vertically downwards along gravity B ) True, it is vertically upwards against gravity C ) False, it is vertically downwards along gravity D ) False, it is vertically upwards against gravity
Ans C ) False, it is vertically downwards along gravity
59) Gravitation was invented by ……………
A ) Kepler B ) Newton C ) Galileo D ) Einstein
Ans B ) Newton
60) Object stable in position : Potential energy : : object in motion : ?
A ) Gravitational energy
B ) Total energy
C ) Kinematical energy
D ) Kinetic energy
Ans D ) Kinetic energy
61) Find the unsuitable option out.
A ) Speed B ) Mass C ) Weight
D ) Distance
Ans C ) Weight
62) If the objects are of irregular shape, then the direction of Force is
A ) Along the line joining their centre of masses
B ) Along the edges of the objects.
C ) Along the line joining their centres
D ) Along the line joining their bases
Ans A ) Along the line joining their centre of masses
63 ) Pick the odd option out:
A ) Speed
B ) Velocity
C ) Displacement
D ) Acceleration
Ans A ) Speed
64) According to which theory, every object in universe attracts each other?
A ) Planetary motion law
B ) Kepler’s theory
C ) Law of Gravitational energy
D ) Theory of universal gravity
Ans D ) Theory of universal gravity
