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

E M B I B E

Physics Crash Course NEET>Chapter 2 - Kinematics>Level 2>Q 13

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IMPORTANT

Earn 100

A passenger train of length $60 m$ travels at a speed of $80 km / hr$ . Another freight train of length $120 m$ travels at a speed of $30 km / hr$ . The ratio of times taken by the passenger train to completely cross the freight train when: (i) they are moving in the same direction, and (ii) in the opposite directions is:

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Important Questions on Kinematics

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IMPORTANT

Physics Crash Course NEET>Chapter 2 - Kinematics>Level 2>Q 14

A car is standing

200 m

behind a bus, which is also at rest. The two start moving at the same instant but with different forward accelerations. The bus has acceleration

2 m s^{- 2}

and the car has acceleration

4 m s^{- 2}

. The car will catch up with the bus after time :

EASY

NEET

IMPORTANT

Physics Crash Course NEET>Chapter 2 - Kinematics>Level 2>Q 15

A car moves in positive

Y

-direction with velocity

v

proportional to distance travelled

y

as

v (y) \propto y^{β}

, where

β

is a positive constant. The car covers a distance

L

with average velocity

<v>

proportional to

L

as

<v> \propto L^{1 / 3}

. The constant

β

is given as

EASY

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IMPORTANT

Physics Crash Course NEET>Chapter 2 - Kinematics>Level 2>Q 16

A particle covers half of the circle of radius

r

. Then the displacement and distance of the particle are respectively

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Physics Crash Course NEET>Chapter 2 - Kinematics>Level 2>Q 17

A fly is in rectilinear motion as described by the graph. The average speed of the fly is

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Physics Crash Course NEET>Chapter 2 - Kinematics>Level 2>Q 18

A ball is dropped vertically from a height

d

above the ground. It hits the ground and bounces up vertically to a height

\frac{d}{2}

Neglecting subsequent motion and air resistance, its velocity

v

varies with the height

h

above the ground as

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Physics Crash Course NEET>Chapter 2 - Kinematics>Level 2>Q 19

A particle starts from the origin at time $t = 0$ and moves along the positive $x -$ axis. The graph of velocity with respect to time is shown in figure. What is the position of the particle at time $t = 5 s ?$
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Physics Crash Course NEET>Chapter 2 - Kinematics>Level 2>Q 20

The velocity time graphs of a car and a scooter are shown in the figure. (i) The difference between the distance travelled by the car and the scooter in 15 s and (ii) the time at which the car will catch up with the scooter are, respectively.

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