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The acceleration of the ball will be g. Initial velocity will be 0.in T sec. body travels h mts. by applying equations of motion we gets= ut +1/2gT2

h = 1/2gT2 ------[1]

in T/3 sec h1 = 1/2gT2/9 -------[2]

from [1] and [2] we get h1 = h/9 distance from point of release.

therefore distance from ground is h-h/9 = 8h/9

1st case

Given charges: +e and +9e

Let the third chare q be placed at a distance x from e and hence its distance from 9e is 16-x cm

For the system to remain in equilibrium,

F1 = F2

Therefore,

F1 = K(e q)/x2

F2 = K(9e)/(16-x)2

Equating F1 and F2 , we get,

9/x2= 1/(16-x)2

Taking square root on both sides:

3/x = 1/(16-x)

Solving for x, we get,

x = 12cm

hence the charge q should be placed at 12 cm from e.

2ndcase

See the figure below,

Now net force at q3 is 0 as given in the question. Hence,

Applying coloumb’s law on q3 we get,

q3q1K/(2x)2+ Kq2q3/x2= 0

q1/4 +q2 = 0

q1 = - q2/4

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Answer for question number 2 is c)5C/3

Area of cube is l3 means l×l×l10×10×10=1000cm3=10m3volume=density/area=7000Kgm-3/10m3=7000kg/10=70

Kinetic Energy of a Body is Directly Proportional to its Mass and Square of its Velocity

Answer: a) length, b) cross sectional areaExplanation: The resistance of a given piece of wire depends of three factors: the length of the wire, the cross-sectional area of the wire, and the resistivity of the material composing the wire.

Specific resistance depends on type of material.

d) of these

Power = work /timeforce*displacement /time400*60/60second400joule/second

We know that at maximum power Eₐ₌v/2= 230/2115 Volt

Work done = Force × Distance.

From the question :

Force = 100 × 10 = 1000N

Distance = 50m

Work done = 50 × 1000 = 50000Joules

Power = Work done /Time

The time = 1 second.

Power = 50000/1 = 50000 Watts

= 50kW

The angular velocity is independent of the clock size, however for larger clocks the linear velocity of the pointers at the end of the hands will be greater. The second hand goes through 2π radians in 1 min, or 2π radian/60 seconds, so ω = π/30 rad.s-1 =0.03 rad.s-1.

none of the above A constant does not depend on anything, its a value. Its not a characteristic of a particular phenomena or define any process.

Its simply a value which is fixed anywhere and anypart of the universe. Just as mass of a body is fixed, be it on the earth or be it in the moon or be it in some other galaxy. Its fixed. But what changes is its weight in different situations, such as a body have different weight on earth and different on moon.

tnx

◆ Answer -

v = k √(gh)

◆ Explaination -

For a object falling freely under gravity, let velocity be expressed as -

v = k.g^x.h^y

Substituting known dimensions of given quantities -

[v] = [g]^x [h]^y

[L1T-1] = [L1T-2]^x [L]^y

[L1T-1] = [L^(x+y) T^(-2x)]

Comparing indexes -

x + y = 1

-2x = -1

Solving these eqns,

x = 1/2

y = 1/2

Therefore, velocity of freely falling body would be -

v = k.g^½.h^½

v = k √(gh)

V=u+atHere u=10m/sa=2m/s^2t=2sec

v=10+2×2=10+4=14m/s

Adding the forces: (2i+2j) + (2i-2j)+ (-4i) = 4i-4i= 0hence ans should be d.

Dei loose it's wrng

thank you Dear... Actually this question came in the KVS examination for PRT and answered wrongly

c is the correct option

c is the right answer

along the radius towards the centre

c is the right answer

Option (c) is right answer

Here the displacement vector is i(2-3)+j(-1-3)+(4+1)k = -i-4j+5k

F = 4i-3j+3k

and W= f.ds = (4i-3j+3k)•(-i-4j+5k) = -4+12+15= 23J.

A repulsive force acts between protons, if they are brought nearer, work must be done by external force.

Hence the potential energy of system increases

4/5. .

4/5 this is right answer

es ko y= MX+c k rup m liknh pr slope -5/4 hogi

the correct answer is-5/4

5/4 is the answer of the question

3. point is correct answer(-5/4)

slope of equation 5x+4y=10 will be -5/4

The correct answers is a - 5/4

correct answer is -5/4

5/4 is the answer may be

4/5 is the correct answer

the right answer is - 5/4

the right answer is -5/4

5×+4y=104y=10-5×y=10/4-5/4×y=mx+c m=-5/4

4y=10-5× ,y=10/4-5/4y=mx+cm=-5/4

-5/4 is the right answer

3) -5/4 is the correct answer

5/4 is the right ans

right answer is 3.-5/4

the answer is -5/4

-5/4 will be the final answer

-5/4 is the answer of this question

4/5 is the correct answer to the question

5/4 is the correct answer

the time in the click is 6.20.

trick 12 o'clock minus whatever time in real watch (11:60)-(4:20)=07:40

(12=11:60=11:59:60)

so 7:40 is answer

7.40 is the correct answer of the given question

7.40 is the correct solution of this question

Distance traveled at 8:30 a.m -- 57321 kmFinal distance traveled at 8:50 a.m -- 57336 kmDistance traveled between 8:30 and 8:50 am -- 57336-57321=15 kmTime taken -- 20 mins( since 8:30 to 8:50 is 20 minutes)

So,speed of car in km per minute = 15/20 km per min.= 0.75 km per min.in km per hour= 15/20 X 60 = 45 kmph.

So the speed of car is 45kmph or 0.75 km per min if it covers 15km in 20 minutes.

When two bodies are rubbed together, electrons get removed from one body and these electrons so removed get transferred to the other body. The body from which the electrons get removed becomes positively charged and the body to which the electrons get transferred becomes negatively charged. Since an electron is a material particle, the mass of the positively charged body decreases and that of the negatively charged body increases. Hence, when one of the two identical metallic spheres is charged positive and the other negative, their masses after charging will not be equal.The metallic sphere which gets negatively charged gains electrons and hence its mass increases. The metallic sphere which gets positively charged loses electrons and hence its mass decreases.

25kg will have greater inertia Heavy objets have more inertia

25 kg has greater inertia.Inertia is directly proportional to mass.

They will rise to same height as according to equation of motion v²-u²=2as. The height (s)will depend upon v ,u & g(which is acceleration due to gravity)but it doesn't depends upon mass.

Kinetic energy is related to linear momentum by

KE=momentum squared divided by twice the mass.

KE for a given momentum is inversely proportional to the mass.

So, the lighter mass has greater kinetic energy.

1)speed of bodyas the other three are related by pe=mgh2)gravitational forceas the other three are realted by ke=1/2mv^2

thank you