Non-zero acceleration without having varying speed

Non-zero acceleration without having varying velocity

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A trolley is moving horizontally with a constant velocity of $v m s^{- 1}$ $w . r . t .$ earth. $A$ man starts running from one end of the trolley with a velocity of $1.5 {vms}^{- 1} w . r . t .$ to trolley. after reaching the opposite end, the man return back and continues running with a velocity $1.5 {vms}^{- 1} w . r . t .$ the trolley in the backward direction. If the length of the trolley is $L$ then the displacement of the man with respect to earth during the process will be:

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Important Questions on Kinematics

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Beta Question Bank for Engineering: Physics>Chapter 4 - Kinematics>Exercise-2>Q 21

A particle $P$ is projected from a point on the surface of smooth inclined plane ( see figure). simultaneously another particle $Q$ is released on the smooth inclined plane from the same position. $P$ and $Q$ collide after $t = 4$ second. the speed of projection of $P$ is:

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Beta Question Bank for Engineering: Physics>Chapter 4 - Kinematics>Exercise-2>Q 22

A particle is projected from a point

P (2, 0, 0) m

with a velocity

10 {ms}^{- 1}

making an angle

45 °

with the horizontal. The plane of projectile motion passes through a horizontal line

PQ

which makes an angle of

37 °

with positive

x -

axis,

x y

plane is horizontal. The coordinates of the point where the particle will strike the line

PQ

is:

(take g = 10 {ms}^{- 2})

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Beta Question Bank for Engineering: Physics>Chapter 4 - Kinematics>Exercise-2>Q 23

A body is thrown horizontally with a velocity

\sqrt{2 g h}

from the top of a tower of height

h .

It strikes the level ground through the foot of the tower at a distance

x

from the tower. The value of

x

is :

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Beta Question Bank for Engineering: Physics>Chapter 4 - Kinematics>Exercise-2>Q 24

A particle

A

is projected with speed

v_{A}

from a point making an angle

60 °

with the horizontal. At the same instant, a second particle

B

is thrown vertically upward from a point directly below the maximum height point of parabolic path of

A

with velocity

v_{B}

. If the two particles collide then the ratio of

v_{A} / v_{B}

should be:

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Beta Question Bank for Engineering: Physics>Chapter 4 - Kinematics>Exercise-2>Q 25

A ball is projected from a certain point on the surface of a planet at a certain angle with the horizontal surface. The horizontal and vertical displacements

x

and

y

vary with time

t

in second as:

x = 10 \sqrt{3} t; y = 10 t - t^{2}

the maximum height attained by the ball is :

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Beta Question Bank for Engineering: Physics>Chapter 4 - Kinematics>Exercise-2>Q 26

A particle moves in the

x y

plane and at time

t

is at the point

(t^{2}, t^{3} - 2 t)

. Then:

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Beta Question Bank for Engineering: Physics>Chapter 4 - Kinematics>Exercise-2>Q 27

The figure shows the velocity time graph of a particle which moves along a straight line starting with velocity at $5 m \sec^{- 1}$ and coming to rest at $t = 30 s$ . Then :

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Beta Question Bank for Engineering: Physics>Chapter 4 - Kinematics>Exercise-2>Q 28

An object may have:

Important Questions on Kinematics

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