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A horizontal force of 130 Newton is required to push a bookcase across a floor at a constant velocity. Find how much is the friction force that acts on the sliding bookcase?
A 20.0 kg crate sits at rest at the bottom of a 12.9 m long ramp that is inclined at 33 degrees above the horizontal. What is the total work done on the crate during its motion from the bottom to the top of the ramp
One of the fastest recorded pitches in major-league baseball, thrown by Tim Lincecum in 2009, how far would the ball fall vertically by the time it reached home plate, 60.5 ft away
The resistor in a series RCL circuit has a resistance of 92Ω, while the voltage of the generator is 3.0V. At resonance,what is the average power delivered to the circuit?
In a slow-pitch softball game, a 0.200-kg softball crosses the plate at 20.0 m/s at an angle of 40.0° below the horizontal. Determine the impulse delivered to the ball
A ball of mass 522 g starts at rest and slides down a frictionless track. It leaves the track horizontally, striking the ground a distance of 1 m from the end of the track after falling the vertical distance 1.25 m from the end of the track.
A projectile is fired from ground at an angle 60 degrees above horizontal to hit a target on the wall, which is 25.0 m away. Find the initial speed of the projectile
A guitar string is 90 centimeter long and has a mass of 3.6 gram. Find the frequencies of the fundamental and first two overtones
A LASIK vision correction system uses a laser that emits 10 -long pulses of light, each with 2.5 of energy. The laser is focused to a 0.90 -diameter circle. What is the average power of each laser pulse
Find an expression for the loop's velocity as a function of time as it enters the magnetic field. You can ignore gravity, and you can assume that the back edge of the loop has not entered the field
Your airplane is caught in a brief, violent downdraft. To your amazement the pretzels on your seat-back tray rise vertically, Evaluate the downward acceleration of the plane
questiona 1.00 ball is thrown directly upward with an initial speed of 16.0. a graph of the balls gravitational
The lob in tennis is an effective tactic when your opponent is near the net. It consists of lofting the ball over his head, forcing him to move quickly away from the net (see the drawing). Suppose that you lob the ball with an initial speed of 17...
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