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Water is dripping from a tap at height $h$ from the ground at regular interval $t_{1}$ . The drops reach the ground at interval $t_{2}$ . Then $t_{2}$ is equal to

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Important Questions on Measurements and Motion

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Science>Physics>Measurements and Motion>Free Fall

A tennis ball is released from a height

h

and after freely falling on a wooden floor it rebounds and reaches height

h / 2

. The velocity versus height of the ball during its motion may be represented graphically by: (graphs are drawn schematically and on not to scale)

EASY

Science>Physics>Measurements and Motion>Free Fall

A body is thrown vertically upwards. Which one of the following graphs correctly represents the velocity

(v)

vs time

(t)

MEDIUM

Science>Physics>Measurements and Motion>Free Fall

A ball is dropped from the top of a

100 m

high tower on a planet. In the last

\frac{1}{2} s

before hitting the ground, it covers a distance of

19 m .

Acceleration due to gravity (in

m s^{- 2}

) near the surface on that planet is______

EASY

Science>Physics>Measurements and Motion>Free Fall

A body is projected vertically upwards with a velocity

' u'

from the top of a tower. Time taken by it to reach the ground is

' n'

times the time taken by it to reach the highest point in its path. Height of the tower is

MEDIUM

Science>Physics>Measurements and Motion>Free Fall

Imagine you have come back from the International Space Station. Share experience with your friends what you have observed there.

EASY

Science>Physics>Measurements and Motion>Free Fall

A person sitting in the ground floor of a building notices through the window, of height

1.5 m,

a ball dropped from the roof of the building crosses the window in

0.1 s .

What is the velocity of the ball when it is at the topmost point of the window?

(g = 10 m s^{- 2})

HARD

Science>Physics>Measurements and Motion>Free Fall

From a tower of height H, a particle is thrown vertically upwards with a speed u. The time taken by the particle, to hit the ground, is n times that taken by it to reach the highest point of its path.The relation between H, u and n is :

EASY

Science>Physics>Measurements and Motion>Free Fall

Water-drops are falling at regular intervals from a water tap situated at a height of

5 meters

from the ground. Just at the moment, the first drop touches the ground, the third drop comes out. At that moment, the height of the second drop of water from the ground will be

MEDIUM

Science>Physics>Measurements and Motion>Free Fall

A body is dropped from rest. Its velocity varies with displacement covered as:

MEDIUM

Science>Physics>Measurements and Motion>Free Fall

Two identical objects A and B each of mass m start moving along the same vertical line in opposite directions at the same instant. Object A is dropped from rest from a height H above the ground and object B is projected vertically upward from the ground with speed

u = \sqrt{2 gH}

. After they collide, they stick to each other. What is the loss in their total energy?

EASY

Science>Physics>Measurements and Motion>Free Fall

A box filled with water has a small hole on its side near the bottom. It is dropped from the top of a tower. As it falls, a camera attached on the side of the box records the shape of the water stream coming out of the hole. The resulting video will show

MEDIUM

Science>Physics>Measurements and Motion>Free Fall

Find the ratio of the distance travelled by a freely falling body during the first and third second of its fall.

EASY

Science>Physics>Measurements and Motion>Free Fall

When a ball is thrown up vertically with a velocity

v_{0}

it reaches a height

h

. If one wishes to triple the maximum height, then the ball should be thrown with a velocity of

MEDIUM

Science>Physics>Measurements and Motion>Free Fall

A ball is thrown vertically downward with a velocity of

20 m s^{- 1}

from the top of a tower. It hits the ground after some time with a velocity of

80 m s^{- 1}

. The height of the tower is:

(g = 10 m s^{- 2})

EASY

Science>Physics>Measurements and Motion>Free Fall

A stone is dropped from the top of a building. When it crosses a point

5 m

below the top, another stone starts to fall from a point

25 m

below the top. Both stones reach the bottom of building simultaneously. The height of the building is :

HARD

Science>Physics>Measurements and Motion>Free Fall

A ball of mass $m$ is thrown upward with a velocity $v$ . The air exerts an average resisting force $F$ . The velocity with which the ball returns to the thrower is

HARD

Science>Physics>Measurements and Motion>Free Fall

Two uniformly dense spherical balls of radius

R

and

2 R

are released simultaneously from identical heights. If both the balls hit the ground at the same time, then the ratio of densities of the balls,

ρ_{R} : ρ_{2 R}

is (here,

ρ_{R}

is the density of the ball with radius

R

and

ρ_{2 R}

is the density of the ball with radius

2 R

)

MEDIUM

Science>Physics>Measurements and Motion>Free Fall

u = \sqrt{2 gH}

. At what height above the ground do they collide?

MEDIUM

Science>Physics>Measurements and Motion>Free Fall

A metal ball of mass $5 kg$ falls from a height of $490 m$ . How much time it will take to reach the ground? $(g = 9.8 m / s^{2})$

HARD

Science>Physics>Measurements and Motion>Free Fall

If a ball is thrown at a velocity of

45 m s^{- 1}

in vertical upward direction, then what would be the velocity profile as function of height? (Assume,

g = 10 m s^{- 2}

)

Water is dripping from a tap at height h from the ground at regular interval t1. The drops reach the ground at interval t2. Then t2 is equal to

Important Questions on Measurements and Motion

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Water is dripping from a tap at height $h$ from the ground at regular interval $t_{1}$ . The drops reach the ground at interval $t_{2}$ . Then $t_{2}$ is equal to