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A model train moves along a horizontal circular track with a radius of 0.5 m. Starting from rest, the train accelerates at 0.2 m/s2. What is the angular acceleration (in rad/s2) of the train?
A 28.0 g object moving to the right at 18.0 cm/s overtakes and collides elastically with a 9.0 g object moving in the same direction at 15.0 cm/s. Find the velocity of each object after the collision
A storage tank 31 m high is filled with pure water. Calculate the magnitude of the net force that acts on a square access hatch at the bottom of the tank that measures 0.6 m by 0.6 m
The voltage drop along a 30.0m segment of a power line made from copper wire (a very good conductor) is 1.2V, while carrying a current of 25.0 A. How large is the electric field along the wire
A wheel of radius 30 cm is rotating at a rate of 2.0 revolutions every 0.080 s. What is the wheel's frequency of rotation
An electron with kinetic energy 1.56 keV circles in a plane perpendicular to a uniform magnetic field. The orbit radius is 23.0 cm. Find the frequency of circling
An atomic bond can be modeled as atoms connected by tiny springs. For an atom tied to a spring the waves, where the positions x is the displacement from the equilibrium position.
Write down an expression for the efficiency of the air cart bumper in terms of the initial and final kinetic energy of the cart. What defines a collision as elastic or inelastic.
A person who weighs 715 N is riding a 98-N mountain bike. Suppose the entire weight of the rider and bike is supported equally by the two tires. find the area of contact between each tire and the ground
A 2.50-kg block slides on a horizontal surface with coefficient of kinetic friction 0.310. It is moving at 5.45 m/s, Find the distance of compression
It's possible to use the ideal-gas law to show that the density of the earth's atmosphere decreases exponentially with height, What is the weight of a column of air
A ball is thrown horizontally from the top of a building that is 13.85 m high with a speed of 17.83 m/s. Neglecting air resistance, at what angle with respect to the horizontal will the ball strike the ground
what would the image distance be (pay attention to sign)? cm d. Could the new image be projected on a screen?
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