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A particle moves along a straight path through displacement d = (8 m)i + cj while force F = (2 N)i - (4N)i acts on it. (Other forces also act on the particle.) What is the value of c if the work done by F on the particle is?
(a) Zero,
(b) Positive, and
(c) Negative?
On a drive from your home to town, you wish to average 56 mph. The distance from your home to town is 76 miles. What average speed must you maintain in the remaining distance
You are designing an elevator for a hospital. The force exerted on a passenger by the floor of the elevator is not to exceed 1.57 times the passenger's weight. What is the maximum speed of the elevator
A student plays around with a 1.0m ruler that can be setup in a stand by means of a knife edge clamp. He puts the knife edge clamp, and the pivot point, at the point where the ruler reads 30 cm. The student realizes this is not a stable position a..
A person is standing at the edge of the water and looking out at the ocean (see figure). The height of the person's eyes above the water is h = 1.8 m, and the radius of the Earth is R = 6.38 x 106 m. (a) How far is it to the horizon? In other word..
a 1.87-m-long 552 g rope pulls a 4.4 kg block of ice across a horizontal frictionless surface. the block accelerates at
A speed skater moving across frictionless ice at 8.3 m/s hits a 5.1 m-wide patch of rough ice. She slows steadily, and then continues on at 6.5 m/s. What is her acceleration on the rough ice
suppose that protons are fired towards the large flat side of a charged conducting plate. initial speed of the protons
A charged paint is spread in a very thin uniform layer over the surface of a plastic sphere of diameter 16.0cm, giving it a charge of -16.0 uc, Find the electric field just inside the paint layer
A copper rod has a length of 1.7 m and a cross-sectional area of4.1 x10-4 m2.One end of the rod is in contact with boiling water and the other with a mixture of ice and water. What is the mass of ice per second that melts? Assume that no heat is l..
Calculate the heat flow through a 0.500m long copper bar with a cross sectional area of 0.50 cm2. One end at 3.0 degrees Celsius and the other end at 100.0 degrees Celsius
A 2 kg book resting on a flat table requires an applied force of 4 N to make it move. Draw a free body diagram illustrating this situation and find the coefficient of static friction between the book and the table.
A 0.196-µF capacitor is connected to a 246-V rms ac source at 44.5 Hz. What is the rms current through the capacitor
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