You can do gravitation anytime.. but for doing doing rotational motion you should know some basics of vector, mechanics and circular motion.. all this is necessary and is used while studying the rotational motion..

While study these chapters some basic formula like force, energy should also be known to you..

Bulk modulus is the measurement of decrease in volume while increase in pressure.the bulk modulus property of material is related to behaviour of elasticity.

Bulk modulus can also be defined as the relative change in the volume of body produced by unit compressive or tensile strength.

Summary:gases will compress more easily than solids and liquids because there is more gap present in between the gas molecules.

Hello Aspirant,

See Physical quantity is nothing but just a property which is used to quantify the measurement. It is is denoted by the combination of a numerical value and unit. Let us take an example to understand it more clearly, suppose your mother asked you to bring sanitizer from the market and now how do you know that how much sanitizer you have to bring so your mother will tell you to bring 250mL of sanitizer or any other quantity. So here 250 mL is the physical which is quantifying the amount of sanitizer to be purchased from market.

I hope this information helps you.

Good Luck!!

Hi Amol Pujari,

Magnetic flux is the product of the average magnetic field times the perpendicular area that it penetrates. it is a quantity of convenience in the statement of faraday's law and in the discussion of objects like transformers and solenoids

The dimensional formula of magnetic flux is

[M ¹ L ² I ^-1 T ^-2 ]

where

• M= Mass
• L=length
• I=Current
• T= Time

hope this information is helpful

ALL THE BEST

Hello,

Your data seems to be insufficient,as there are 3 cases for projection at different angles ie. Projection from ground,projection form a height,projection from an inclined plane however following are the conclusions that I could arrive at-

1)At 6 different angles means that the range of the object will be maximum at 45 degrees.If the object is thrown at less than 45 degrees the range of the projectile will be small.

2)If the object is throw at an angle greater than 45 degrees it will mean that the maximum height reached by the object will be greater however the range will be less than the maximum range.

3)From T=(u *cos(thetha))/g,time of flight of object is directly proportional to the initial velocity of the object which here in this case is same for all angles at the object is thrown.Since time is directly proportional to cosint of the angle of projection (which is a decreasing function) increasing the thetha will result in decrease of time of flight.

Hope this helps.

All the best!

Hello,

The velocity of ball is u m/s

The velocity of descending balloon is v m/s

Therefore, the velocity of ball w.r.t. balloon is u + v m/s

Now, the ball will pass the balloon when the relative displacement between the two is zero.

Now, displacement is given by, s = u't + 1/2 * a * t^2

= s = (u + v)*t - 1/2 * g * t^2 = 0 [ a = (-g) = acceleration due to gravity and u' = u + v]

Taking t common, we have:

t * [ (u + v) - 1/2 * g * t ] = 0 which gives t = 0 or [ (u + v) - 1/2 * g * t ] = 0

Since t cannot be equal to 0, therefore, we have: [ (u + v) - 1/2 * g * t ] = 0

Rearranging and solving the above equation, we get:

t = 2 * ( u + v ) / g (Answer)

Hello,

The displacement of a body is given by s = ut + 1/2 * a * t^2

For a freely falling body, u = 0

Therefore, s1 = 1/2 * a * t^2 = 1/2 * 10 * t^2 = 5 * t^2

Therefore, s1 = 5 * t ^2

For a body falling with an initial velocity of 2 m/s, displacement after time t second will be, s2:

s2 = 2 * t + 1/2 *10*t^2

s2 = 2t + 5 * t^2

Now, when the separation between them is 18 m ( I have assumed 18 m in place of 18 years because I think you have typed it incorrect)

Therefore, s2 - s1 = 18

2t + 5 * t^2 - 5 * t^2 = 18

2t = 18

t = 9 seconds (Answer)

Hello,

Assume the length of the spring to be 'l'

Now the ratios of lengths in which the spring is cut is 1:2:3

That means the length of the three new springs will be x, 2x and 3x where x is equal to some constant.

Therefore, 1x + 2x + 3x = l

= 6x = l

= x = l/6

Now length of new springs will be l/6, 2l/6 and 3l/6

(Substituting the value of x = l/6)

Hope it is clear now.