How much work was done by the person who pulled on the cord

Assignment Help Physics
Reference no: EM13270291

A small block with a mass of 0.117 kg is attached to a cord passing through a hole in a horizontal frictionless surface as shown in the figure below. The block is originally revolving at a distance of 0.33 m from the hole with a speed of 0.66 m/s. The cord is then pulled from below, shortening the radius of the circle in which the block revolves to 0.10 m. At this new distance the speed of the block is observed to be 2.80 m/s.

(a) What is the tension in the cord in the original situation when the block has speed v = 0.66 m/s?

(b) What is the tension in the cord in the final situation when the block has speed v = 2.80 m/s?

(c) How much work was done by the person who pulled on the cord?

Reference no: EM13270291

Questions Cloud

What legal standards could the court apply in evaluating : What legal standards could the court apply in evaluating the constitutionality of a law and which would apply in this instance?
What is the decrease in kinetic energy of the bullet : A 3.00-g bullet, traveling horizontally with a velocity of magnitude 370 m/s, is fired into a wooden block with mass 0.800 kg, What is the decrease in kinetic energy of the bullet
Define the ph of a solution prepared by diluting : Calculate the pH of a solution prepared by diluting 2.5 mL of 1M acetic acid up to a final volume of 100 mL (pka 4.76)
Determine acceleration of the proton when it has a velocity : a proton moves through a region containing a uniform electric field given by E=50.0 v/m and a uniform magnetic field B=(0.200+.300+.400)T. Determine the acceleration of the proton when it has a velocity v=10.0m/s
How much work was done by the person who pulled on the cord : A small block with a mass of 0.117 kg is attached to a cord passing through a hole in a horizontal frictionless surface, How much work was done by the person who pulled on the cord
Define what is the ph of rainwater in equilibrium : Assuming levels of atmospheric CO2 are 390 ppm CO2, what is the pH of rainwater in equilibrium with the atmosphere for the pre-industrial atmospheric CO2 concentration of 280 ppm,v.
Obtain the surface and contour plots for the temperature : A square metal plate is heated to 80 degrees celsius at the corner corresponding to x = y = 1. The temperature distribution in the plate is described by T = 80e^(-(x-1)^2)*e^(-3(y-1)^2) Obtain the surface and contour plots for the temperature.
Determine output y using complex domain analysis technique : Consider a continuos time LTI system with step response given by ys(t) = tu(t) - (t - 2)u(t-2). Determine the output y(t) if the input to the system is given by x(t) = u(t) - u(t - 2) using complex domain (not time domain) analysis techniques.
What is the angular magnification of the telescope : The eyepiece of a refracting telescope (see Fig.34.53 in the textbook) has a focal length of 9.00 cm. What is the angular magnification of the telescope

Reviews

Write a Review

 

Physics Questions & Answers

  Find the sum of these four vector forces

Make a drawing of this situation, and choose the best axes for x and y so that you have the least number of components.)

  Draw a free body diagram for the negative charge

Three equal positive charges Q are each fixed at a corner of an equiliateral triangle of side length a, Draw a free body diagram for the negative charge, Find the magnitudes of the net force on the negative charge

  Illustrate what is the intensity of the beam transmitted

Illustrate what is the intensity of the beam transmitted through the three sheets when 1 = 19.0°, 2 = 51.0° and 3 = 100.0° ?

  Find the tension in the hitch

A car is towing a boat on a trailer. The driver starts from rest and accelerates to a velocity of +16.6 m/s in a time of 34.3 s, What is the tension in the hitch that connects the trailer to the car

  Express the total power radiated

At some automobile toll-collecting stations, the thin metal wire sticks up from the road and makes contact with cars before they reach the toll collector. What is the reason of this wire.

  Illustrate what is the decibel level at yards away

A shotgun blast of 140 decibels occurs with humidity of 70% and temperature of 50 degrees. Illustrate what is the decibel level at 100 yards away? At 200 yards

  At what angle is the rope held

What approximations or simplifying assumptions must you make in the calculations? (Note: Some of these choices are false because they are wrong physics!)

  Find out the speed of the block

An ideal spring with a stiffness of 379N/m is attached to a wall, and its other end is attached to a block that has a mass of 16-kg. The spring/block system is then stretched away from the spring's relaxed position until 59J of mechanical potentia..

  Illustrate what is magnetic field in that region of space

.A cosmic-ray proton in interstellar space has an energy of 10.0 MeV and executes a circular orbit having a radius equal to that of Mercury’s orbit around the Sun (5.80 m). Illustrate what is the magnetic field in that region of space?

  What is the electric field in (v/m) in the region

Consider a standing wave on the string with a frequency equal to the fifth harmonic (fn = nf1 with n = 5). How many nodes and antinodes does this standing wave possess.

  Find the magnitude of the magnetic field

Consider an XY coordinate plane. Wire A is placed along the y-axis at x=0 and wire B is placed parallel to wire A at x= 0.240 m, Find the magnitude of the magnetic field at x=0.380 m

  What are angles of refraction

What are angles of refraction

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