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A 0.135kg ball is thrown straight up from 2.07m above the ground. Its initial vertical speed is 5.20m/s. A short time later, it hits the ground. Calculate the total work done by the force of gravity during that time.
A 25 kg box is released from rest on a frictionless ramp making an angle of 42o with the horizontal. Determine the normal force on the box
Presume that the strength of the electric ?eld about an isolated point charge has a certain value at a distance of 4 m.
A hotel elevator ascends 273 m with a maximum speed of 3.78 m/s. Its acceleration and deceleration both have a magnitude of 0.91 m/s2. How long does it take to make the complete trip from bottom to top?
A guitar string of length L =1 is pulled upward at the middle so that it reaches height h. What is the subsequent motion of the string if it is suddenly released
A proton (m=1.67x10-27 kg) is being accelerated along a straight line at 3.6*10^5 m/sec2 in a machine. If the proton has an initial speed of 2.4x10^7 m/sec.
The earth orbits the sun once per year at the distance of 1.50 x 1011 m. How long (in earth days) does it take for Venus to make one orbit
You are pushing a 150-kg wooden crate in a straight line a distance of 4.5 m across a wooden floor. The crate is speeding up at 0.22 m/s2. What is the work done by friction on the crate
determine the speed of the ball after the ball. A positive charge q is fired by a small hole in the positive plate of a capacitor.
What is the resultant velocity of the motor boat. What distance downstream does the boat reach opposite shore.
Two steel juggling balls each carry a charge of 2.75 ?C. find the distance between the centers of the two balls
In a series R-L-C circuit, R= 300oms, Xc=300oms and XL=500 oms . The average power consumed in the resistor is 60.0 W. What is the power factor of the circuit
The current supplied by a battery in a portable device is typically 0.131 A. Find the number of electrons passing through the device
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