PHYSICS MCQS FOR IIT JEE NEET IAS SAT MAT Multiple Choice Questions Answers Fully Solved IITJEE main advanced Trust Education

1487 Pages·2019·5.24 MB·English

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UNIFORM MOTION MULTIPLES
UNIFORM MOTION

1. A particle starts from rest and moves with constant
acceleration a. what is the nature of the graph between
the time (t) and the displacement.
(a) straight line
(b) instant velocity
(c) average speed
(d) average velocity
2. A particle starts with velocity u and moves with constant
acceleration a .what is the nature of the graph between
the time (t) and the displacement (x).
(a) straight line
(b) symmetric parabola
UNIFORM MOTION MULTIPLES
© Asymmetric parabola
(d) Rectangular hyperbola.
3. For motion on a curved path with constant acceleration
[magnitude of displacement /distance covered
(a) >1
(b) ≥ 1
(c) ≤ 1
(d) <1
4. A particle moving with uniform speed can possess :
(a) radial acceleration
(b) tangential acceleration
© both radial and tangential accelerations
(d) neither radial nor tangential acceleration
UNIFORM MOTION MULTIPLES
5. A car accelerates from rest for time t at constant rate a
1 1
and then it retards at the constant rate a for time t and
2 2
comes to rest. t /t =
1 2
(a) a /a
1 2
(b) a /a
2 1
(c) a 2/a 2
1 2
(d) a 2/a 2
2 1
6. What is the angle between instantaneous displacement
and acceleration during the retarded motion
(a) Zero
(b) π/4
(c) π/2.
(d) π.
UNIFORM MOTION MULTIPLES
7. the velocity graph of a motion starting from rest with
uniform acceleration is a straight line:
(a) Parallel to time –axis.
(b) parallel to velocity axis
© not passing through origin
(d) having none of the above characteristics.
8. The slope of the velocity time graph for retarded
motion is:
(a) Positive
(b) negative
(c) zero
(d) can be +ve, -ve or zero.
9. Which of the following can be zero when the particle is
in motion for some time ?
UNIFORM MOTION MULTIPLES
(a) Displacement
(b) Distance covered
© speed
(d) none of the above
10. Which of the following statement is false for motion with
uniform velocity
(a) The motion is along a straight line path.
(b) The motion is always in the same direction
© Magnitude of displacement < distance covered
(d) Average velocity is equal to the instantaneous
velocity.
11. A particle is moving on a straight line path with constant
acceleration directed along the direction of
UNIFORM MOTION MULTIPLES
instantaneous velocity. Which of the following
statements about the motion of particle is true.
(a) Particle may reverse the direction of motion.
(b) distance covered = magnitude of displacement
(c) average velocity is less than average speed
(d) average velocity = instantaneous velocity.
12. if the displacement of a particle is zero, then what can
we say about its distance covered ?
(a) it must be zero.
(b) it cannot be zero.
© it is negative
(d) it may or may not be zero.
UNIFORM MOTION MULTIPLES
13. a particle moves with uniform velocity. Which o fthe
following statements about the motion of the particle is
true.
(a) its speed is zero.
(b) its acceleration is zero.
© its acceleration is opposite to the velocity.
(d) its speed may be variable
14. A car travels a distance S on a straight road in two hours
and then return to the starting point in the next here
hours. Its average velocity is :
(a) S/5
(b) 2S/5
(c) (S/2)+(S/3)
(d) none of the above.
UNIFORM MOTION MULTIPLES
15. A particle starts with initial velocity 10ms-1.. it covers a
distance of 20 m along a straight into two seconds.
What is the acceleration of the particle.
(a) zero
(b) 1 ms-2.
(c) 10ms-2
(d)20 ms-2.
16. A particle moves along a straight line path. After
sometime it comes to rest. The motion is with an
acceleration whose direction with respect to the
direction o velocity is
(a) positive throughout motion
(b) negative throughout motion
(c) first positive then negative
UNIFORM MOTION MULTIPLES
(d) first negative then positive
17. The time elapsed is plotted along X-axis and the
acceleration is plotted along the Y-axis. The area
between the graph and the X-axis gives.
(a) Average velocity
(b) distance covered
(c) differences in velocities
(d) difference in accelerations
18. The velocity ν and displacement r of a body are related
as : ν2 =kr where k is constant.
What will be the velocity after 1 second. Given that the
displacement is zero at t=0.
(a)√kr
(b) kr3/2.