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

Change in gravitational force, prove that the weight of a body at an elevat...

prove that the weight of a body at an elevation of h from sea level is expressd by the equation

What is heat treatment and why is it done, What is heat treatment and why i...

What is heat treatment and why is it done? Heat treatment can be described as a combination of operations or processes in which cooling and heating of an alloy or metal is done

Program evaluation and review techniques, Program Evaluation and Review Tec...

Program Evaluation and Review Techniques: The Rola and Cola Corporation is a professional II nursing home aspiring to become I nursing home. It desires to provide the ultimate

How do we adjust throttle free play?, (a) What is the function of a throttl...

(a) What is the function of a throttle valve? Where it is used? (b) How do we adjust throttle free play?

Derive the equation for the shape of the surface, (Rigid body rotation) De...

(Rigid body rotation) Derive the equation for the shape of the surface zsurf(rsurf) for a rigid-body rotation of water at angular speed (rad/sec). Follow this process: 1) S

Design the keys - shear keys, Design the keys - Shear Keys: A solid ci...

Design the keys - Shear Keys: A solid circular shaft is to transmit 200 kN at 200 rpm. If the maximum shear stress is not to exceed 80 n/mm 2 design the shaft. Design the key

Find out also the loss of energy through impact, Find out also the loss of ...

Find out also the loss of energy through impact: Example 1. A bullet weighing 0.1 newton horizontally fired with a velocity of 80 metres/sec hits a wooden block, weighin

Draw shear force and bending moment diagrams, A cantilever of length 2m car...

A cantilever of length 2m carries a uniformly distributed load of 1.5 KN/m run over the whole length and appoint load of 2KN at a distance of 0.5 from the free end draw the Shear

Describe and calculate humidity ratio, (a) Describe and calculate i) Hum...

(a) Describe and calculate i) Humidity Ratio ii) DPT iii) Relative Humidity iv) Density v) Enthalpy of atmosphere air when DBT is 35 0 C, WBT is 23 0 C and the ba

Tank drainage-apparent viscosity-laminar flow, Tank Drainage A large op...

Tank Drainage A large open vertical tank has three small, smooth, well-rounded orifices spaced equidistantly at ¼ h , ½ h , ¾ h up from the bottom of the tank (Fig. Q1). Water

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