This quiz is completed
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?
straight line
instant velocity
average speed
average velocity
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)?
straight line
symmetric parabola
For motion on a curved path with constant acceleration [magnitude of displacement /distance covered?
>1
≥1
≤1
<1
A particle moving with uniform speed can possess:
radial acceleration
tangential acceleration
both radial and tangential accelerations
neither radial nor tangential acceleration
A car accelerates from rest for time t1 at constant rate a1 and then it retards at the constant rate a2 for time t2 and comes to rest. t1/t2=
a1/a2
a2/a1
a12/a22
a22/a12
What is the angle between instantaneous displacement and acceleration during the retarded motion?
Zero
π/4
π/2
π
the velocity graph of a motion starting from rest with uniform acceleration is a straight line:
Parallel to time -axis.
parallel to velocity axis
not passing through origin
having none of the above characteristics.
The slope of the velocity time graph for retarded motion is:
Positive
negative
zero
can be +ve, -ve or zero.
Which of the following can be zero when the particle is in motion for some time?
Displacement
Distance covered
speed
none of the above
Which of the following statement is false for motion with uniform velocity?
The motion is along a straight line path.
The motion is always in the same direction
Magnitude of displacement < distance covered
Average velocity is equal to the instantaneous velocity.
A particle is moving on a straight line path with constant acceleration directed along the direction of instantaneous velocity. Which of the following statements about the motion of particle is true?
Particle may reverse the direction of motion.
distance covered = magnitude of displacement
average velocity is less than average speed
average velocity = instantaneous velocity.
if the displacement of a particle is zero, then what can we say about its distance covered?
it must be zero.
it cannot be zero.
it is negative
it may or may not be zero.
a particle moves with uniform velocity. Which of the following statements about the motion of the particle is true?
its speed is zero.
its acceleration is zero.
its acceleration is opposite to the velocity.
its speed may be variable
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:
S/5
2S/5
(S/2)+(S/3)
none of the above.
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.
zero
1 ms-2.
10ms-2
20 ms−2.
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:
positive throughout motion
negative throughout motion
first positive then negative
first negative then positive
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:
Average velocity
distance covered
differences in velocities
difference in accelerations
The velocity v and displacement r of a body are related as: v2=kr where k is constant. What will be the velocity after 1 second. Given that the displacement is zero at t=0.
√kr
kr3/2.
kr
data is not sufficient
The position of a particle moving on a straight line path is given by x=12+18t+9t2 meter its velocity at t=2 s is:
84ms−1
72 ms−1
54ms−1.
36 ms−1.