A particle is moving along the positive x -axis as x = a t - 3 + b t - 3 2 + 4 t - 3 , which of the following is true?

The acceleration of the particle is 2 b

The initial velocity of the particle is a - 2 b + 4

The particle is at origin at t = 4

The acceleration of particle is 6 b

A bomb is dropped by a fighter plane flying horizontally. To an observer sitting in the plane, the trajectory of the bomb is a :

straight line vertically down the plane

parabola in a direction opposite to the motion of plane

parabola in the direction of motion of plane

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A wheel starting from rest gains an angular velocity of $10 rad s^{- 1}$ after being uniformly accelerated for $5 \sec$ . The total angle through which it has turned is

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Important Questions on Kinematics

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Physics Crash Course NEET>Chapter 2 - Kinematics>Level 1>Q 101

A block of

200 g

mass moves with a uniform speed in a horizontal circular groove, with vertical side walls of radius

20 cm

. If the block takes

40 s

to complete one round, the normal force by the side walls of the groove is:

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Physics Crash Course NEET>Chapter 2 - Kinematics>Level 1>Q 102

If a particle moves in a curved path, it must have a component of acceleration

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Physics Crash Course NEET>Chapter 2 - Kinematics>Level 1>Q 103

If a point charge

q

is moving in a circle of radius

r

with speed

v,

then time period

T

of the point charge will be

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Physics Crash Course NEET>Chapter 2 - Kinematics>Level 1>Q 104

A car goes around uniform circular track of radius

R

at a uniform speed

v

once in every

T

seconds. The magnitude of the centripetal acceleration is

a_{c}

. If the car now goes uniformly around a larger circular track of radius

2 R

and experiences a centripetal acceleration of magnitude

8 a_{c}

. Then, its time period is

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Physics Crash Course NEET>Chapter 2 - Kinematics>Level 1>Q 105

Two cars

S_{1}

and

S_{2}

are moving in coplanar concentric circular tracks in the opposite sense with the periods of revolution

3 \min

and

24 \min

, respectively. At the time

t = 0,

the cars are the farthest apart. Then, the two cars will be,

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Physics Crash Course NEET>Chapter 2 - Kinematics>Level 1>Q 106

Two parallel discs are connected by a rigid rod of length $L = 0.5 m$ centrally. Each disc has a slit oppositely placed as shown in the figure. A beam of neutral atoms is incident on one of the discs axially at different velocities $v$ , while the system is rotated at angular speed of, $600 rev s^{- 1}$ , so that atoms only with a specific velocity emerge at the other end. Calculate the two largest speeds (in meter/second) of the atoms that will emerge at the other end.

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Physics Crash Course NEET>Chapter 2 - Kinematics>Level 1>Q 107

A particle at a distance of

1 m

from the origin starts moving such that

\frac{d r}{d θ} = r,

where

(r, θ)

are polar coordinates. Then the angle between resultant velocity and tangential velocity component is:

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Physics Crash Course NEET>Chapter 2 - Kinematics>Level 1>Q 108

A simple pendulum is oscillating without damping. When the displacement of the bob is less than maximum, its acceleration vector

\vec{a},

is correctly shown in which of the following figure ?

A wheel starting from rest gains an angular velocity of 10 rad s-1 after being uniformly accelerated for 5 sec. The total angle through which it has turned is

Important Questions on Kinematics

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A wheel starting from rest gains an angular velocity of $10 rad s^{- 1}$ after being uniformly accelerated for $5 \sec$ . The total angle through which it has turned is