NEET Physics - New - Kinematics

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Question - 1

If the body is moving in a circle of radius r with a constant speed v, its angular velocity is:

  • A \(\frac{v^ 2}{r}\)
  • B vr
  • C \(\frac{v}{r}\)
  • D \(\frac{r}{v}\)

Question - 2

If a particle moves in a circle describing equal angles in equal times, its velocity vector: 

  • A Remains constant
  • B Changes in magnitude
  • C Changes in direction
  • D Changes both in magnitude and direction

Question - 3

If the velocity of a particle is υ = At + Bt2, where A and B are constants, then the distance travelled by it between 1 s and 2 s :

  • A \(\frac{A}{2}\) + \(\frac{B}{3}\)
  • B \(\frac{3}{2}\)A + 4B
  • C 3A + 7B
  • D \(=\frac {3}{2}A + \frac {7}{3}B\)

Question - 4

A particle of unit mass undergoes one dimensional motion such that its velocity varies according to υ(x) = βx-2n, where β and n are constants and x is the position of the particle. The acceleration of the particle as a function of x is given by:

  • A -2β2x2n+1
  • B -2nβ2e-4n+1
  • C -2nβ2x2n-1
  • D -2nβ2x-4n-1

Question - 5

A stone falls freely under gravity. It covers distances  h1, h2 and h3 in the first 5 seconds, the next 5 seconds and the next 5 seconds respectively. The relation between h1, h2 and h3 is :

  • A h1 = 2h2  =  3h3
  • B h1 =  \(\frac{h_{2}}{3} = \frac{h_{3}}{5} \)
  • C h2 = 3h1  and  h3 =  3h2 
  • D h1 = h2  =  h3

Question - 6

A particle covers half of its total distance with speed υ1  and the rest half distance with speed υ2 Its average speed during the complete journey is :

  • A \(\frac{υ_{1}υ_{2}}{υ_{1}+υ_{2}}\)
  • B \(\frac{2υ_{1}υ_{2}}{υ_{1}+υ_{2}}\)
  • C \(\frac{2υ_{1}υ^{2}_{2}}{υ^{2}_{1}+υ^{2}_{2}}\)
  • D \(\frac{υ_{1}+υ_{2}}{2}\)

Question - 7

A boy standing at the top of a tower of 20m height drops a stone. Assume g = 10 m / s2 , the velocity with which it hits the ground is :

  • A 10.0 m/s
  • B 20.0 m/s
  • C 40.0 m/s
  • D 5.0 m/s

Question - 8

A man of 50 kg mass is standing in a gravity free space at height of 10m above the floor. He throws a stone of 0.5 kg mass downwards with speed of 2 m/s. When the stone reaches the floor the distance of the man above the floor will be :

  • A 9.9 m
  • B 10.1 m
  • C 10.0 m
  • D 20 m

Question - 9

A bus is moving with a speed of 10 m/s on a straight road. A scooterist wishes to overtake the bus in 100s. If the bus is at a distance of 1 km from the scooterist, with what speed should the scooterist chase the bus?

  • A 40 m/s
  • B 25 m/s
  • C 10 m/s
  • D 20 m/s

Question - 10

A particle starts its motion from rest under the action of a constant force. If the distance covered in first 10 seconds is S1 and that covered in the first 20 seconds is S2, then __________

  • A S2 = 3S1
  • B S2 = 4S1
  • C S2 = S1
  • D S2 = 2S1
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