Calculate the work done, Physics

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?

Posted Date: 2/26/2013 4:08:19 AM | Location : United States







Related Discussions:- Calculate the work done, Assignment Help, Ask Question on Calculate the work done, Get Answer, Expert's Help, Calculate the work done Discussions

Write discussion on Calculate the work done
Your posts are moderated
Related Questions
Determine the moment or torque that force P applies at point A about the vertical axis if force P in Newtons is given in P10 and the angle in degrees shown on the diagram is given

practical applications of vectors in everyday life

Q State Faraday's laws of electrolysis? First Law: The mass of a substance unconventional at an electrode is directly proportional to the charge passing through the electrol

Derive a mathematical expression for the force per unit length experienced by each of the two long current carrying conductors placed parallel to each other in air. Hence explain o

A bottle and marble Pour some sand into a wide mouthed bottle. Place a piece of cardboard about 5 cm square over the mouth of the bottle. Set the marble on the cardboard and th


Give the theory of plane diffraction grating for normal incidence.

division

steradian; sr: The supplementary SI unit of solid angle described as the solid central angle of a sphere which encloses a surface onto the sphere equivalent to the square of t

What are the characteristics of laser? Characteristics of LASER: The given are the properties of laser that differentiate this from ordinary light as: a. Monochromaticit