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A child's toy arrow has a suction cup on one end. When the arrow moving in positive x direction hits the wall, it sticks. The radius of the suction cup is 1.0 cm. Suppose that the mass of the arrow is about 10 g and it is concentrated in the suction cup. Assume that a vacuum exists between the suction cup and the wall. The atmospheric pressure is 1.0×105N/m2.
Determine the magnitude of the gravitational force exerted by Earth on the suction cup.
Find the force needed to pull a mass of 10 kilogram at a constant speed up a plane inclined at an angle of 30 degree with the horizontal if the coefficient of kinetic friction is μk= 0.15
In hydraulic jacks,a car is placed at one end and force is applied on the other piston to lift it. if the areas of the pistons are A1 and A2 such that A2 > A1, in which end should the car be placed? why?
An engine based on the Stirling cycle uses 2.2 kg of N; as its working fluid. 570 kJ of heat enters at a temperature of 850 K during each cycle. Heat is exhausted at 330 K. You may neglect the temperature dependence of the specific heat in this probl..
By accident, a large plate is dropped and breaks into three pieces. The pieces fly apart parallel to the floor, find the masses of pieces 1 and 2
Assume the sound speed in air is 343 m/s. A parachutist leaps from a hovering helicopter and after 3.1s of free fall shouts back toward the helicopter
An AC generator consists of eight turns of wire, each having area A = 0.0890 m2, with a total resistance of 11.4 ?. Determine the induced emf and current as functions of time
An atom in an excited state 4.02 eV above the ground state remains in that excited state 2.50 ?s before moving to the ground state. Find the wavelength of the emitted photon
A converging lens with a focal length f1 = 4cm is placed to the left of a second identical lens f2. What is the separation distance between the two lenses
To help prevent frost damage, fruit growers sometimes protect their crop by spraying it with water when overnight temperatures are expected to go below the freezing mark. How much heat is released by the water when it freezes
Early in the morning, when the temperature is 5.0°C, gasoline is pumped into a car's 45 L steel gas tank until it is filled to the top. How much gasoline spills out in this case
Two lenses are placed 30 cm apart. The first lens has a focal length of +20 cm, and the second lens has a focal length of -10cm. If an object is placed 100 cm in front of the first lens, where is the final image located? Give your answer in relation ..
A gate is free to rotate without friction about its hinges at H. The gate is initially at rest. Compute the magnitude of the mud's angular momentum about H
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