Q.1
The displacement of a particle is given by $y=a+bt+ct^2-dt^4$ The initial velocity and acceleration are respectively
  • b, -4d
  • –b, 2c
  • b, 2c
  • 2c, -4d
Q.2
In 1.0s, a particle goes from point A to point B, moving in a semicircle of radius 1.0 m as shown in below Figure. The magnitude of average velocity is
kinematics-mcq-neet-2.png
  • 3.14 m/s
  • 0 m/s
  • 2 m/s
  • 1 m/s
Q.3
A particle moves along a straight line such that its displacement at any time t is given by : $x=(t^3-6t^2+3t+4)$ metres The velocity when the acceleration is zero is
  • -9 m/s
  • 42 m/s
  • -15 m/s
  • 3 m/s
Q.4
The ratio of magnitudes of average velocity to average speed, is
  • always less than one
  • always equal to one
  • always more than one
  • equal to or more than one
Q.5
The displacement x of a particle varies with time t as $x=ae^{- \alpha t}+be^{ \beta t}$, where a, b, $\alpha$ and $\beta$ are positive constants. The velocity of the particle will  
  • go on decreasing with time
  • be independent of $\alpha$ and $\beta$
  • drop to zero when $\alpha = \beta$
  • go on increasing with time
Q.6
The displacement-time graph of a moving particle is shown in
kinematics-mcq-neet-1.png
  • D
  • E
  • C
  • F
Q.7
What determines the nature of the path followed by the particle?
  • Speed
  • Velocity
  • Acceleration
  • Both (b) and (c)
Q.8
The correct statement from the following is
  • A body having zero velocity will not necessarily have zero acceleration
  • A body having zero velocity will necessarily have zero acceleration
  • A body having uniform speed can have only uniform acceleration
  • A body having non-uniform velocity will have zero acceleration
Q.9
A body is thrown vertically upwards. If air resistance is to be taken into account, then the time during which the body rises is
  • equal to the time of fall.
  • twice the time of fall.
  • less than the time of fall.
  • greater than the time of fall.
Q.10
The displacement of a body is given to be proportional to the cube of time elapsed. The magnitude of the acceleration of the body, is
  • constant but not zero
  • increasing with time
  • zero
  • decreasing with time
Q.11
A particle is thrown vertically upward. Its velocity at half of the height is 10 m/s, then the maximum height attained by it (g=$10 \ m/s^2$)
  • 8m
  • 20cm
  • 10cm
  • 16 m
Q.12
A car moves from X to Y with a uniform speed $v_u$ and returns to Y with a uniform speed $v_d$. The average speed for this round trip is
  • $\sqrt {v_u v_d} $
  • $\frac {v_u v_d}{v_u + v_d}$
  • $\frac {v_u + v_d}{v_u v_d}$
  • $\frac {2v_u v_d}{v_u + v_d}$
Q.13
If a ball is thrown vertically upwards with speed u, the distance covered during the last t seconds of its ascent is
  • ut
  • $\frac {1}{2} gt^2$
  • $ut-\frac {1}{2} gt^2 $
  • (u+gt)t
Q.14
Assertion : A body can have acceleration even if its velocity is zero at a given instant of time. Reason : A body is momentarily at rest when it reverses its direction of motion
  • Both assertion and reason are true and reason is the correct explanation of the assertion.
  • Both assertion and reason are true, but reason is not correct explanation of the assertion
  • assertion is true, but reason is false.
  • both assertion and reason are false.
  • reason is true but assertion is false
0 h : 0 m : 1 s