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Science MCQ

T1 CH2 Force and Motion · Tamil Nadu Board STD 7 (Tamil - English Medium). 13 questions.

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13 questions · timed · auto-graded

MCQ 11 Mark
How can we increase the stability of an object?
  • ✓
    Lowering the centre of gravity
  • B
    Raising the centre of gravity
  • C
    Increasing the height of the object
  • D
    Shortening the base of the object
Answer
Correct option: A.
Lowering the centre of gravity
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MCQ 21 Mark
From the given v-t graph it can be inferred that an object is
  • A
    in uniform motion
  • B
    at rest
  • C
    in non - uniform motion
  • ✓
    moving with uniform accelerations
Answer
Correct option: D.
moving with uniform accelerations
moving with uniform accelerations
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MCQ 31 Mark
Suppose a boy is enjoying a ride on a merry go round which is moving with a constant speed of $10 m/s.$ It implies that the boy is
  • A
    at rest
  • B
    moving with no acceleration
  • ✓
    in accelerated motion
  • D
    moving with uniform velocity
Answer
Correct option: C.
in accelerated motion
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MCQ 41 Mark
Which of the following figures represent uniform motion of a moving object correctly?
  • ✓
  • B
  • C
  • D
Answer
Correct option: A.
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MCQ 51 Mark
A particle is moving in a circular path of radius r. The displacement after half a circle would be
  • A
    Zero
  • B
    R
  • ✓
    2r
  • D
    r/2
Answer
Correct option: C.
2r
2r
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MCQ 61 Mark
If the velocity of a body does not a changes , then its acceleration is ________
  • A
    Infinity
  • B
    unity
  • ✓
    Zero
  • D
    between zero and unity
Answer
Correct option: C.
Zero
Zero
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MCQ 81 Mark
Velocity-time graph of an object is given below the object has
  • A
    uniform velocity
  • ✓
    uniform retardation
  • C
    uniform speed
  • D
    variable retardation
Answer
Correct option: B.
uniform retardation
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MCQ 91 Mark
The slope of a velocity$-$time graph gives
  • A
    velocity
  • B
    distance
  • C
    displacement
  • ✓
    acceleration
Answer
Correct option: D.
acceleration
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MCQ 101 Mark
A car is moving along a straight road with uniform velocity which is the correct representation
  • A
    Image
  • B
    Image
  • C
    Image
  • ✓
    Image
Answer
Correct option: D.
Image
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MCQ 111 Mark
Average speed of a moving object is equal to the magnitude of its average velocity when it travels.
  • ✓
    in a straight line without turning back
  • B
    in a circle
  • C
    back and forth
  • D
    in a zig-zag path
Answer
Correct option: A.
in a straight line without turning back
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MCQ 121 Mark
Which of the following is correct
  • A
    magnitude of displacement may be greater than distance.
  • ✓
    Distance is always greater than or equal to the magnitude of displacement.
  • C
    Distance is always greater than the magnitude of displacement.
  • D
    Both are scalar quantities.
Answer
Correct option: B.
Distance is always greater than or equal to the magnitude of displacement.
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MCQ 131 Mark
Distance travelled by a body in a given time
  • A
    is always positive
  • ✓
    can be zero or positive
  • C
    is always negative
  • D
    either (a) or (c)'
Answer
Correct option: B.
can be zero or positive
can be zero or positive
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