Motion in a Straight Line NEET Questions

Physics - Kinematics

Motion in a Straight Line MCQ Questions


13.
Galileo's law of odd numbers: distances in successive equal time intervals from rest are in ratio:
A.
1:2:3:4
B.
1:3:5:7
C.
1:4:9:16
D.
2:4:6:8
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ANSWER :
B. 1:3:5:7
14.
A particle has zero velocity at an instant. Which is necessarily true?
A.
Its acceleration is also zero
B.
It is permanently at rest
C.
Its acceleration can be non-zero
D.
Its displacement is zero
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ANSWER :
C. Its acceleration can be non-zero
15.
Which x-t graph is physically impossible for 1D motion?
A.
Straight line with positive slope
B.
Parabola
C.
Vertical line at a given time
D.
Curve with continuously changing slope
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ANSWER :
C. Vertical line at a given time
16.
Ball dropped from 90 m (g = 10 m/s²). Speed just before first collision with floor:
A.
30 m/s
B.
40 m/s
C.
42.4 m/s
D.
45 m/s
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ANSWER :
C. 42.4 m/s
17.
Displacement in nth second of uniformly accelerated motion is:
A.
sₙ = v₀ + a(n − ½)
B.
sₙ = v₀n + ½an²
C.
sâ‚™ = vâ‚€ + an
D.
sₙ = ½an²
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ANSWER :
A. sₙ = v₀ + a(n − ½)
18.
Kinematic equations of uniform acceleration apply to uniform circular motion?
A.
Yes, always
B.
Yes, only for small angles
C.
No, never
D.
Yes, when speed is constant
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ANSWER :
C. No, never