Work-power-energy, Mechanical Engineering

 

Under the action of constant force, a 2kg block moves such that its position x as a function of time is given by X=t^3/3 ,where x in meters and t in sec , the workdone by force in first 2 seconds is

A 26.6 j

B 3.3 j

C 16 j

D 32 j

Solution) v=dx/dt=t^2,a=dv/dt=2t,f(t)=ma(t),w=∫f(t)*v(t) dt (from x=0 to x=2 sec)

Posted Date: 3/11/2013 1:55:51 AM | Location : United States







Related Discussions:- Work-power-energy, Assignment Help, Ask Question on Work-power-energy, Get Answer, Expert's Help, Work-power-energy Discussions

Write discussion on Work-power-energy
Your posts are moderated
Related Questions
Forces working on dam: Let a dam retaining water as illustrated in Figure (a). What are the forces working on it? Solution The forces working on dam are as follows:

Normal 0 false false false EN-IN X-NONE X-NONE MicrosoftInternetExplorer4

What is the magnitude of frictional force after perfect rolling begins and why? solution) After pure rolling begins,frictional force is 0. This is because the velocity of he c

Method of joint: How you can find out force in the member of truss by using method of joint? Sol.: In this, after determining the reactions at supports, the equilibrium

Q. What do you understand by Carburization? Carburization is initiated by the adsorption of carbon in contact with the surface of the metal and may progress by diffusion along

Link O4C of a 4-bar mechanism is subjected to a torque T4=1Nm[ccw]. The link BC is subjected to a force Q=45N @900 downwards. Determine the torque T2 on link O2B and the reactions

Average force of resistance: A gun weighing 500 kN is utilized to fire a shell weighing 10 kN in a horizontal direction with a velocity of 500 metres/sec. With what initial ve

Perfect Frame - Truss: Perfec t Frame The frame that is composed of such members, which are sufficient to keep the frame in equilibrium, when the frame is sustaining the

Terms related to stream engine: STEA M ENGINE MAIN PARTS: 1 .     Frame: It supports the various moving parts. 2 .     Cylinder: It forms a chamber in which the

the component of computer integrated manufacturing with the diagram