Water drops fall at regular intervals from a tap which is 5 m above the ground. The third drop is leaving the tap at the instant the first drop touches the ground. How far above the ground is the second drop at that instant

(1) 2.50 m

(2) 3.75 m

(3) 4.00 m

(4) 1.25 m

Concept Questions :-

Uniformly accelerated motion
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A ball is thrown vertically upwards from the top of a tower at $4.9\text{\hspace{0.17em}\hspace{0.17em}}m{s}^{-1}$. It strikes the pond near the base of the tower after 3 seconds. The height of the tower is

(1) 73.5 m

(2) 44.1 m

(3) 29.4 m

(4) None of these

Concept Questions :-

Uniformly accelerated motion
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An aeroplane is moving with horizontal velocity u at height h. The velocity of a packet dropped from it on the earth's surface will be (g is acceleration due to gravity)

(1) $\sqrt{{u}^{2}+2gh}$

(2) $\sqrt{2gh}$

(3) 2 gh

(4) $\sqrt{{u}^{2}-2gh}$

Concept Questions :-

Uniformly accelerated motion
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A rocket is fired upward from the earth's surface such that it creates an acceleration of 19.6 m/sec2. If after 5 sec its engine is switched off, the maximum height of the rocket from earth's surface would be [MP PET 1995]

(1) 245 m

(2) 490 m

(3) 980 m

(4) 735 m

Concept Questions :-

Non-uniform acceleration
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A bullet is fired with a speed of $1000\text{\hspace{0.17em}\hspace{0.17em}}m/\mathrm{sec}$ in order to hit a target 100 m away. If $g=10\text{\hspace{0.17em}\hspace{0.17em}}m/{s}^{2}$, the gun should be aimed

(1) Directly towards the target

(2) 5 cm above the target

(3) 10 cm above the target

(4) 15 cm above the target

Concept Questions :-

Uniformly accelerated motion
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A body starts to fall freely under gravity. The distances covered by it in first, second and third second are in ratio

(1) 1 : 3 : 5

(2) 1 : 2 : 3

(3) 1 : 4 : 9

(4) 1 : 5 : 6

Concept Questions :-

Uniformly accelerated motion
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P, Q and R are three balloons ascending with velocities U, 4U and 8U respectively. If stones of the same mass be dropped from each, when they are at the same height, then

(1) They reach the ground at the same time

(2) Stone from P reaches the ground first

(3) Stone from R reaches the ground first

(4) Stone from Q reaches the ground first

Concept Questions :-

Uniformly accelerated motion
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A body is projected up with a speed ‘u’ and the time taken by it is T to reach the maximum height H. Pick out the correct statement

(1) It reaches H/2 in T/2 sec

(2) It acquires velocity u/2 in T/2

(3) Its velocity is u/2 at H/2

(4) Same velocity at 2T

Concept Questions :-

Uniformly accelerated motion
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A body falling for 2 seconds covers a distance S equal to that covered in next second. Taking $g=10\text{\hspace{0.17em}}m/{s}^{2},\text{\hspace{0.17em}}S=$

(1) 30 m

(2) 10 m

(3) 60 m

(4) 20 m

Concept Questions :-

Uniformly accelerated motion
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A body dropped from a height h with an initial speed zero, strikes the ground with a velocity $3\text{\hspace{0.17em}}km/h$. Another body of same mass is dropped from the same height h with an initial speed $-{u}^{\text{'}}=4km/h$. Find the final velocity of second body with which it strikes the ground

(1) 3 km/h

(2) 4 km/h

(3) 5 km/h

(4) 12 km/h

Concept Questions :-

Uniformly accelerated motion
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Difficulty Level: