The inertia of a moving object depends on:
i. Mass of the object ii. Momentum of the object iii. Speed of the object iv. Shape of the object Choose the correct option:
i. Mass of the object ii. Momentum of the object iii. Speed of the object iv. Shape of the object Choose the correct option:
Anonymous Quiz
28%
(i) and (ii)
54%
only (i)
12%
only (ii)
7%
(iii) and (iv)
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The earth and the moon are attracted to each other by gravitational force. The earth attracts the moon with a force that is:
Anonymous Quiz
38%
More than that exerted by the moon
47%
Same as that exerted by the moon
11%
Less than that exerted by the moon
4%
Not related to that exerted by the moon
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The mass of moon is about 0.012 times that of the earth and its diameter is about 0.25 times that of earth. The value of G on the moon will be:
Anonymous Quiz
25%
Same as that on the earth
18%
About one-fifth of that on the earth
48%
About one-sixth of that on the earth
9%
About one-fourth of that on the earth
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An apple falls from a tree because of the gravitational attraction between the earth and the apple. If F1 is the magnitude of the force exerted by the earth on the apple and F2 is the magnitude of the force exerted by the apple on the earth, then
Anonymous Quiz
29%
F1 is very much greater than F2
26%
F2 is very much greater than F1
41%
F1 and F2 are equal
4%
F1 is only a little greater than F2
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A stone is released from the top of a tower of height 19.6 m. Then its final velocity just before touching the ground will be:
Anonymous Quiz
18%
384.16 m/ s
36%
196 m/s
40%
19.6 m/s
6%
3841.4 m/s
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Two particles are placed at some distance. If the mass of each of the two particles is doubled, keeping the distance between them unchanged, the value of gravitational force between them will be:
Anonymous Quiz
21%
1/4 times
52%
4 times
16%
1/2 times
11%
Unchanged
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A ball weighing 4 kg of density 4000 kgm-3 is completely immersed in water of density103 kgm-3. What will be the buoyant force acting on it?
Anonymous Quiz
19%
100 N
31%
10 N
44%
1600N
6%
16 N
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Choose the correct unit for the relative density among the following:
Anonymous Quiz
16%
kg/cm
34%
unitless
10%
kg/cm1
40%
kg/m3
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An object having mass equal to 350 g occupies 200 cm3 of the space. When this object is thrown into a river what will be the condition of this object there? (Density of water = 1 g/ cm3)
Anonymous Quiz
28%
It will float on the surface of water
31%
It will float fully submerged in the liquid
33%
It will sink in the liquid
8%
It will float partially submerged in the liquid
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A man is carrying the heavy luggage from one platform to the other of a Railway station but still according to the logics of science his work done is said to be zero. Can you opt out the correct reason?
Anonymous Quiz
15%
The force is acting along the direction of displacement of luggage
67%
The force is acting perpendicular to the direction of displacement of luggage
12%
The force is acting opposite to the direction of displacement of luggage
6%
None of these
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When a body falls freely towards the earth, then its total energy
Anonymous Quiz
15%
Decreases
31%
Increases
17%
First increases and then decreases
37%
Remains constant
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The school bags are generally provided with the broad strips because:
Anonymous Quiz
15%
It will spread the force of bag over the large area of shoulder of child producing large pressure
63%
It will spread the force of bag over the large area of shoulder of the child producing less pressure
9%
It has become a trend among the students to carry the bags with wide strips
12%
It will spread the force of bag over the small area of shoulder of child producing less pressure
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Two objects of different masses falling freely near the surface of moon would:
Anonymous Quiz
28%
Have different accelerations
18%
Undergo a change in their inertia
32%
Have same velocities at any instant
22%
Experience forces of same magnitude
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When a body like earth is moving in a circular path the work done in that case is zero because:
Anonymous Quiz
21%
Centripetal force acts in the direction of motion of the body
23%
Centripetal force acts along the radius of circular path
18%
Gravitational force acts along the radius of circular path
38%
Centrifugal force acts perpendicular to the radius of circular path
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A car is accelerated on a leveled road and attains a velocity 4 times of its initial velocity. In this process, the kinetic energy of the car
Anonymous Quiz
19%
Becomes twice to that of the initial
35%
Becomes four times to that of the initial
13%
Remains the same
33%
Becomes 16 times to that of the initial
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The momentum of a bullet of mass 20 g fired from a gun is 10 kg m/s. The kinetic energy of this bullet in kJ will be:
Anonymous Quiz
19%
25
39%
2.5
32%
0.25
10%
5
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