Physics Crash Course NEET>Chapter 2 - Kinematics>Level 3>Q 1

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A ball is thrown horizontally from a height with a certain initial velocity at time $t = 0$ . The ball bounces repeatedly from the ground with the coefficient of restitution less than $1$ as shown.

Neglect air resistance and taking the upward direction as positive, which figure qualitatively depicts the vertical component of the ball's velocity $(v_{y})$ as a function of time $(t)$ ?

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Important Questions on Kinematics

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Physics Crash Course NEET>Chapter 2 - Kinematics>Level 3>Q 2

The angle between two vectors

x

and

y

is

θ

. If the resultant vector

z

makes an angle

\frac{θ}{2}

with

x

, then which of the following is true?

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Physics Crash Course NEET>Chapter 2 - Kinematics>Level 3>Q 3

Which of the following is a unit vector perpendicular to

\vec{A}

and

\vec{B}

?

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Physics Crash Course NEET>Chapter 2 - Kinematics>Level 3>Q 4

If

\vec{a} = 2 \hat{i} + 3 \hat{j} + 4 \hat{k}

and

\vec{b} = 4 \hat{i} + 3 \hat{j} + 2 \hat{k}

, find the angle between

\vec{a}

and

\vec{b}

.

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Physics Crash Course NEET>Chapter 2 - Kinematics>Level 3>Q 5

Two particles are projected from the same point with the same speed u such that they have the same range R, but different maximum heights,

h_{1}

and

h_{2} .

Which of the following is correct?

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Physics Crash Course NEET>Chapter 2 - Kinematics>Level 3>Q 6

A ball is dropped from a height

H

from rest. The ball travels

\frac{H}{2}

in last

1.0 s

. The total time taken by the ball to hit the ground is

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Physics Crash Course NEET>Chapter 2 - Kinematics>Level 3>Q 7

A stone is projected with velocity

2 \sqrt{g h}

, so that it just clears two walls of equal height

h

, at distance of

2 h

from each other. The time interval of passing between the two walls is

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Physics Crash Course NEET>Chapter 2 - Kinematics>Level 3>Q 8

At what angle

θ

to the horizontal should an object is projected so that the maximum height reached is equal to the horizontal range?

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Physics Crash Course NEET>Chapter 2 - Kinematics>Level 3>Q 9

Two bullets are fired simultaneously, horizontally and with different speeds from the same place. Which bullet will hit the ground first?