Work-power-energy, Mechanical Engineering

Assignment Help:

 

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)


Related Discussions:- Work-power-energy

Calculate the power angle, Question: A 3-phase, 15 kV, 4-pole, cylindri...

Question: A 3-phase, 15 kV, 4-pole, cylindrical rotor synchronous generator is connected to infinite bus running at 50 Hz. The synchronous reactance of the machine is X s = 0.

Calculate the magnitude of maximum bending moment, Calculate the magnitude ...

Calculate the magnitude of maximum bending moment: The shear force diagram for the overhanging beam is illustrated in Figure. Draw the loading diagram & bending moment diagram

Volume fraction of fibres, Volume fraction of fibres: The epoxy materi...

Volume fraction of fibres: The epoxy material is prepared to be stressed to its full strength. What must be volume fraction of fibres? Solution Here σ′ = 1200 MPa,

Determine the permissible shear stress, A helical compression spring is use...

A helical compression spring is used to take the shock. The initial compression of the spring is 30 mm and it is further compressed by 50 mm while absorbing the shock. The spring i

Casting, causes and remedy of coldshut,misruns,shirnkage cavity,microporosi...

causes and remedy of coldshut,misruns,shirnkage cavity,microporosity,metal penetration,mismatch

Heat Pumps, Write an essay on air, water and soil-based heat pumps. Discuss...

Write an essay on air, water and soil-based heat pumps. Discuss the advantages and the disadvantages of each system. For each system identify the conditions under which that system

Derive the stability condition of a four wheel vehicle, Derive the stabilit...

Derive the stability condition of a Four wheel Vehicle AND Two wheel Vehicle moving in a curved Path? Explain with working, measurement and construction of brake power by Rope b

Determine the residual plastic strain in the members, As part of the fitti...

As part of the fitting of the mooring lines to a wave energy device, the pin-jointed structure shown in Figure Q is to be subjected to a small degree of plastic deformation by appl

Cost, why are future costs not always relevant?

why are future costs not always relevant?

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd