Rajan

This page lists questions and answers that were posted by visitors named Rajan.

Questions

The following questions were asked by visitors named Rajan.

A stone is thrown vertically upward from the top of a 30m high building with a velocity of 15m/s. Taking the acceleration of stone as 9.81 m/s2. And taking that as constant, determine a) the velocity v and elevations sy of stone above the ground at any ti...

A ball of mass 8 kg is thrown vertically upward from the ground , with an initially velocity of 25 m/s. Determine the maximum height to which it will travel if atmospheric resistance is neglected.

A flywheel has an angular speed of 1200 rev/min when its motor is turned off. The wheel attains constant decelerations of 1.5 rad/s2 due to friction in its bearing. Determine the time required for the wheel to come to rest and the number of revolutions th...

Two moving balls collide together. Determine the magnitude of their common final velocity. The first ball of mass o.5 kg and a velocity va = 3i+5j m/s. The second ball B has a mass of 1 kg and a velocity vb = 1.2i-j+1.8k m/s

True or false (Each question carries 1 marks) (i) A rigid body is an idealization of the behavior of a body. (ii) A Geo-stationary satellite follows a circular orbit at a unique and has a time period of 24h. (iii) Constancy of areal velocity for a central...

State the principle of impulse and momentum. And clearly difference between impulse and impact

Capitalism believe in___________from the government

___________is the scientific study of human society and social interaction

Gravin communication system is followed in _____________ a) Formal Organisation b)Informal Orgamosation c)Both a & b d)None of this

The concept of appropriate technology appeared first in mind____________ Don't have any option. please help someone to get the answer.

Making best use of the sources available is known as____________ (Don't have any optional answers.pls help someone to get the answer)

The power developed by force is ________ and that of couple is _______

Multiple choice question The coefficient if restitution is defined on basis of ________ a)Velocity compound along the line of impact only b)Velocity compound normal to the line of impact c)Velocity vectors before and after collision d)Energies of bodies b...

For a perfectly plastic central impact ______ Multiple choice question a)The entire kinematic energy of two bodies must be lost b)The two bodies must be move stuck together only if the impact is direct.

The coefficients of friction depends up on ________ a)Nature of the surface b)Shape of the surface c)Area of the contact surface d)Weight of the body

The bulbs manufactured by a company gave a mean life of 3000 hours with standard deviation of 400 hours. If a bulb is selected at random, what is the probability it will have a mean life less than 2000 hours? Question: 1) Calculate the probability. 2) In...

When an otherwise eligible inmate in good standing is assigned to an employment or treatment program officer than that of his or her choice, it is an example of subsuming the needs of inmate to what

A shop keeper gives an offer 'buy one get one free'on the suits marked at Rs.630 each and still makes a profit if 20%. Find the C.P of each suit

what is meant by efficiency of a machine is 60%?

Two charges -1 microcoulumb and 2 microcoulumb are placed at the corner A and B of an equilateral triangle ABC of side 2m. Calculate the electric field at C

A(x)= |4-3x| A'(x)={ ,if x<4/3 ,if x>4/3 I have to try to find the derivative of this function using a piecewise function and I'm a bit confused about how to do so. Could someone explain how?

f''(x)= 4e^x-9sin(x) f(0)=3 f(pi/2)=0 I am to find f(x); but I am confused about how to do that. Could I please get some help? I think I have to find f'(x) and then go backwards from there, but my answer doesn't seem to work.

Answers

The following answers were posted by visitors named Rajan.

KE=PE+W(fr) m•v²/2 =m•g•h+F(fr) •s, F(fr) =m(v²/2•s – g/ siná)

Please help me to elaborate the answer as i tried but couldn't

Please help me to elaborate the answer as i tried but couldn't

Please help me to elaborate the answer as i tried but couldn't

Please help. its very urgentW

Please help. its very urgentW

Please help. its very urgentW

Nevermind, I just figured out how to do it! My apologies!!

Ah, thank you! My apologies for not showing my work; I got f(x)= 4e^x+9sinx+cx but forgot that it would be cx+c2 so I was just confused on how to solve it with the two f(x) values given. Thanks again!