Uniformly Accelerated Motion and its Relations, Velocity-Time, Position-Time Graph NEET Questions

Physics - Kinematics

Uniformly Accelerated Motion and its Relations, Velocity-Time, Position-Time Graph MCQ Questions


13.
A train decelerates from 72 km/h to rest in 200 m. What is the deceleration? (72 km/h = 20 m/s)
A.
1 m/s²
B.
2 m/s²
C.
0.5 m/s²
D.
4 m/s²
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ANSWER :
A. 1 m/s²
14.
The slope of a position-time (x-t) graph gives:
A.
Acceleration
B.
Displacement
C.
Velocity
D.
Distance
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ANSWER :
C. Velocity
15.
For uniform motion (zero acceleration), the velocity-time graph is:
A.
A straight line inclined to the time axis
B.
A parabola
C.
A straight line parallel to the time axis
D.
A curve
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ANSWER :
C. A straight line parallel to the time axis
16.
A ruler drop experiment is used to measure reaction time. The ruler falls under free fall. If it falls 20 cm, reaction time (g = 10 m/s²) is approximately:
A.
0.4 s
B.
0.2 s
C.
0.1 s
D.
0.04 s
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ANSWER :
B. 0.2 s
17.
A body moving with velocity 20 m/s is uniformly decelerated to rest in 10 s. The retardation is:
A.
2 m/s²
B.
10 m/s²
C.
20 m/s²
D.
0.5 m/s²
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ANSWER :
A. 2 m/s²
18.
The displacement of a particle in the nth second of uniformly accelerated motion is given by: (u=initial vel., a=accln.)
A.
u + a(2n-1)/2
B.
u + a(n-1)
C.
u*n + ½a*n²
D.
u + an
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ANSWER :
A. u + a(2n-1)/2