Alpha Question Bank for Medical: Physics>Chapter 4 - Kinematics>Exercise-4>Q 11

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A particle is projected from ground in vertical direction at $t = 0 .$ At $t = 0.8 s,$ it reaches $h = 14 m .$ It will again come to same height at $t = ? [g = 10 {ms}^{- 2}]$

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Important Questions on Kinematics

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Alpha Question Bank for Medical: Physics>Chapter 4 - Kinematics>Exercise-4>Q 12

Three particles are projected upward with initial speeds

10 {ms}^{- 1}, 20 {ms}^{- 1}

and

30 {ms}^{- 1} .

The displacements covered by them in their last second of motion are

x_{1}, x_{2}

and

x_{3}

then

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Alpha Question Bank for Medical: Physics>Chapter 4 - Kinematics>Exercise-4>Q 13

Two particles are projected vertically upwards with the same velocity on two different planets with accelerations due to gravities

g_{1}

and

g_{2}

respectively. If they fall back to their initial points of projection after lapse of time

t_{1}

and

t_{2}

respectively. Then,

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Alpha Question Bank for Medical: Physics>Chapter 4 - Kinematics>Exercise-4>Q 14

A ball is dropped vertically from a height

d

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

d / 2

. Neglecting subsequent motion and air resistance, its velocity

v

varies with the height

h

above the ground is

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Alpha Question Bank for Medical: Physics>Chapter 4 - Kinematics>Exercise-4>Q 15

A particle moves along the $Y$ -axis and its $y$ -coordinate $(y)$ changes with time $(t)$ as $y = u (t - 2) + a (t - 2)^{2}$ .

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Alpha Question Bank for Medical: Physics>Chapter 4 - Kinematics>Exercise-4>Q 16

The displacement of a body from a reference point is given by,

\sqrt{x} = 2 t - 3

where

' x'

is in metres and tin seconds. This shows that the body:

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Alpha Question Bank for Medical: Physics>Chapter 4 - Kinematics>Exercise-4>Q 17

Which of the following graphs are wrong for a particle performing rectilinear motion, provided there is no collision any where

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Alpha Question Bank for Medical: Physics>Chapter 4 - Kinematics>Exercise-4>Q 18

The displacement of a moving particle is proportional to the square of the time. For this particle

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Alpha Question Bank for Medical: Physics>Chapter 4 - Kinematics>Exercise-4>Q 19

A stone is dropped from a running bus. It will hit the ground in a-