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A rock is dropped straight down from the top of a 49.2 meter building. How long does it take for the rock to hit the ground?
How fast is the rock moving on impact?
Roughly, how fast is this in miles per hour?
A rifle with a weight of 35 N fires a 5.0-g bullet with a speed of 250 m/s, If a 675-N man holds the rifle firmly against his shoulder, find the recoil speed of the man and rifle
The 3.3 kg piece of wood slides on the surface. The curved sides are perfectly smooth, but the rough horizontal bottom is 35 m long and has the kinetic friction coefficient of 0.24 with the wood. The piece of wood starts from rest 6.0 m above the rou..
A length of aluminium wire is connected to a precision 10.00 V power supply, and at 20.0C the current through it is measured precisely to be 0.4212 A. determine the unknown temperature
A uniform rod of mass M and length L is sitting vertically with one end resting on a frictionless surface, perfectly balanced. Find the angular velocity of rod just as it hits the ground
Equipotentials between two parallel lines with a floating circular electrode: I dont need to know the exact potentials, What should be the potential inside the electrode
A spring with constant k=15 N/m hangs from the ceiling. A ball is attached to the spring and allowed to come to rest. it is then pulled down 6 cm and free. if the ball makes 30 oscillations in 20 seconds, what are its maximum speed.
A copper wire and an aluminum wire of the same length have the same resistance. What is the ratio of the diameter of the copper wire to that of the aluminum wire
A uniform magnetic field points out of the page. The field fully penetrates a wire loop in the plane of the page. what is the averaged induced current
A uniform rod of mass 2.65×10?2kg and length 0.450m rotates in a horizontal plane about a fixed axis through its center, find the angular speed of the rod after the rings leave it
In one day, a 85 kg mountain climber ascends from the 1440 m level on a vertical cliff to the top at 2360 m . The next day, she descends from the top to the base of the cliff, which is at an elevation of 1310 m
If you were on a spaceship traveling a 0.5c away from a star, at what speed would the starlight pass you
The gravitational force exerted on a baseball is 2.25 N down. A pitcher throws the ball horizontally with velocity 15.5 m/s by uniformly accelerating it along a straight horizontal line for a time interval of 154 ms. Through what distance does it ..
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