A car drives along a road section free of curves with speed v0 first through the hollow of a valley (radius of curvature r1) and then over a mountain top (radius of curvature r2). Let the driver have mass m. What changes in his weight does the driver observe when passin...
a man 6ft tall walks at the rate of 5ft/sec toward a streetlight that is 16ft above the ground. At what rate is the length of his shadow changing when he is 10ft from the base of the light?
a light shines from the top of a pole 50ft high. a ball is dropped from the same height from a point 30 ft away from the light. how fast is the ball's shadow moving along the ground 1/2 sec later? (assume the ball falls at a distance of s=16t^2 in t sec)
The force which is required to move an object of mass 500g to a distance of 4m
A pulley with diameter D = 27in weighs 80 lb. It is mounted on a diameter d = 2-in axle. A weight of 1000 lb is to be lifted. If the coefficient of friction f = 0.1, what vertical pull force P will be needed?
Help in writing a thesis and persuasive essay. I am horrible at doing this and would like someone to help me with it.
Do you believe in love at first sight? Romeo and Juliet evidently did. The play covers the time-span of only a few days. In this short period of time, Romeo and Juliet fall in love so passionately that they are willing to die if they cannot be together. craft a thesis about Ro...
On one evening at 6 p.m., the temperature was 24°F. As the night progressed, the temperature dropped at the steady rate of 4°F per hour. a. Make a table of values for the function for values of x from 0 through 8. Let 0 represent the time of 6 p.m. b. Write a function ...
Currently, Jodi has a collection of 44 CDs and Veronica has a collection of 22 CDs. Jodi is adding 2 CDs per month to her collection; Veronica plans to add 4 CDs per month. a. Write a system of equations for this situation. Explain your method. b. Graph the system of equation...
an 80 kg man rides in a car which makes a turn. he moves along a curve with a radius of 20m at a constant speed of 20m/s. how much centripetal force acts on him?
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