Calculate the work done, Physics

Assignment Help:

Problem

The work done by a force as it acts on an object equals the force times the displacement times the cosine of the angle between the force and displacement vectors.

a)  Calculate the work you do if you apply a horizontal force of 220 N to a box and it moves forward by 11 m.

Problem

You need to lift a 40 kg box up 1.5 m to put it in a moving van.

a)  How much force do you need to apply if you lift the box straight up at constant velocity?

b)  How much work do you do in lifting the box into the van?

c)  Calculate the force you must apply to the box if you push it up a 10° ramp.  How does this compare to the force from a)?

d)  Calculate the work done in pushing the box up the ramp to the van.  How does this compare to the work from b)?

Problem

You throw a baseball by applying a force of 300 N to the ball over a horizontal distance of 1 m in the direction of the displacement.  The ball has a mass of 145 g.

a)  How much work do you do to the ball?

b)  Using the Work-Kinetic Energy Theorem, find the final speed of the ball as it leaves your hand.  What is this in miles per hour?


Related Discussions:- Calculate the work done

Differentiate between helmholtzs and gibbs free energy, Determine the chang...

Determine the change in Entropy accompanying the isothermal expansion of 5 moles of an ideal gas to 6 times to its initial volume at 330 k. Differentiate between Helmholtz's and

What is raman shift, Q. What is Raman shift? In 1928 Sir C.V. Raman fi...

Q. What is Raman shift? In 1928 Sir C.V. Raman fined out experimentally that the monochromatic light is scattered when it is allowed to pass through a substance. The scattered

Motion in one dimension , if joe rides his bicycle in a straigght line for ...

if joe rides his bicycle in a straigght line for 15 min with an average velocity of 12.5 km/h south how far has he ridden

Graphical representation of potential, When we move from a positive charge ...

When we move from a positive charge towards an equal negative charge along the line joining the two then initially potential reduces in magnitude and at centre changes into zero, b

Equation of continuity, An equation that states a fluid passing through a p...

An equation that states a fluid passing through a pipe flows at a rate that is inversely proportional to the cross-sectional area of the pipe. i.e., if the pipe constricts, the flu

Calculate the absolute pressure within the chamber in bars, (i) A closed sy...

(i) A closed system consisting of 2 kg of a gas undergoes a process during which the relationship between pressure and specific volume is pv1.3 = c. The process begins with 1 p =1b

Merit of a scanning electron microscope, Q. Give one merit of a scanning el...

Q. Give one merit of a scanning electron microscope over a transmission electron microscope? Answer:- The SEM has turn into more popular than the TEM as it can produce ima

Vibrating strings, Two wires on a piano are the same length and are pulled ...

Two wires on a piano are the same length and are pulled by the same tension. wire 1 vibrates at a frequency 1.5 times the frequency of wire 2. Calculate the ratio of their masses (

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