Wednesday
October 22, 2014

Posts by JAYZ


Total # Posts: 21

Physics
The graph below shows the force applied to a 4.0 kg cart initially at rest but free to move on a horizontal track. Forces (in N) are measured on the ordinate and times (in s) are measured on the abscissa. Use the following values for the graph: a = 4.9 and x = 2.0. Assume the ...
April 14, 2014

Calculus
For what values of x is the graph of y=x e^{-4 x} concave down?
April 12, 2014

Math
find the points on x^2+y^2=11 where the tangent line has slope 11/60
February 4, 2014

Calculus 1
Find all the points on the ellipse 3x^2-xy+y^2=64 that lie on the line y=3x
January 25, 2014

Physics
A 2.1 kg pendulum bob hangs from a 2 meter string. It is pulled to the side, position A, so that the bob is 79 cm (h on the sketch) above the lowest position, position C. The bob is released and begins to swing. See below.
December 7, 2013

physics
A skier of mass 77.7 kg, starting from rest, slides down a slope at an angle $\theta$ of 35.7° with the horizontal. The coefficient of kinetic friction is 0.08. What is the net work, i.e. net gain in kinetic energy, (in J) done on the skier in the first 10.9 s of descent?
November 22, 2013

Calculus
Given f''(x)= -4sin(2x) and f'(0)=4 and f(0) =-6. Find f(pi/2)
November 19, 2013

Physics
A 20.5 N weight is held in the outstretched hand of a person with a shoulder-to-elbow length of 30.0 cm and an elbow-to-wrist length of 24.0 cm. The center of the weight is 5.5 cm from the person's wrist. Determine the magnitude of the torque about the elbow produced by ...
November 8, 2013

Physics
thank you very much!, really appreciate it!
November 8, 2013

Physics
Four point masses are arranged on the xy plane as follows. Mass1 = 47.0 grams at x = 2.00 cm and y = 2.00 cm. Mass2 = 55.0 grams at x = 0.00 cm and y = 4.00 cm. Mass3 = 27.0 grams at x = -3.00 cm and y = -3.00 cm. Mass4 = 45.0 grams at x = -1.00 cm and y = 2.00 cm. What is the...
November 8, 2013

Physics
yea i had the answer but forgot the negative, thanks man! really appreciate it!
November 8, 2013

Physics
A potter’s wheel of radius 53.13 cm and mass 106.4 kg is freely rotating at 47.1 rev/min. The potter can stop the wheel in 5.65 s by pressing a wet rag against the rim and exerting a radially inward force of 66.2 N. What is the angular acceleration of the wheel?
November 8, 2013

Physics
A 33.7 kg block m1 is on a horizontal surface, connected to a 7.10 kg block m2 by a massless string as shown in the Figure. The pulley is massless and frictionless.
October 26, 2013

Physics
A crate of mass 43 kg is loaded onto the back of a flatbed truck. The coefficient of static friction between the box and the truck bed is 0.47. What is the maximum acceleration a (in m/s2) the truck can have without the crate sliding off?
October 26, 2013

Physics
Two masses M1 = 6.10 kg and M2 = 3.90 kg are on a frictionless surface, attached by a thin string. A force of 47.7 N pulls on M2 at an angle of 29.5° from the horizontal as shown in the figure. Calculate the tension T in the string.
October 14, 2013

Physics
A 149 kg crate is pushed at constant speed up a frictionless inclined plane of theta = 51 with the horizontal. Assuming one pushes with a horizontal force, what is the magnitude of the force F (in N) required to do this?
October 14, 2013

Physics
A 149 kg crate is pushed at constant speed up a frictionless inclined plane of $\theta$ = 51 $^{\circ}$ with the horizontal. Assuming one pushes with a horizontal force, what is the magnitude of the force F (in N) required to do this?
October 14, 2013

Physics
You plan to throw stones by using a sling of length 0.6 m which you whirl over your head. Suppose you wish to throw a stone a distance of 32 m. What must be the centripetal acceleration of the stone just before its release if it is to reach this distance? Assume that the ...
September 28, 2013

PRACTICAL ENGLISH
In a short story, any pronoun that indicates a person or thing spoken of is given in the _______ person.
September 27, 2010

PRACTICAL ENGLISH
In the following sentence, identify the part of speech of the italicized word. Large fish swim swiftly in the sea. A. Pronoun B. Adjective C. Noun D. Adverb
September 27, 2010

writing sentences and paragraphs
Which one of the following words is an antonym of joyful? A. Morose B. Garrulous C. Agitated D. Passive
August 5, 2010

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