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Use the work-energy theorem to solve each of these problems. Youcan use Newton's laws to check your answers. Neglect air resistancein all cases.
a) A branch falls from the top of a96.0-m-tall redwood tree, startingfrom rest. How fast is it moving when it reaches the ground?b) A volcano ejects a boulder directly upward 510 m into the air. How fast was the bouldermoving just as it left the volcano?c) A skier moving at 5.45 m/sencounters a long, rough horizontal patch of snow havingcoefficient of kinetic friction 0.220 with her skis. How far does she travel on this patch before stopping?d) Suppose the rough patch in part (c) was only 2.90 m long? Howfast would the skier be moving when she reached the end of thepatch?e) At the base of a frictionless icy hill that rises at 25.0°above the horizontal, a toboggan has a speed of 10.0 m/s toward the hill. How high verticallyabove the base will it go before stopping?
If the original force between two objects is 0.86N, and the distance is tripled, what is the new gravitational force between the objects
A jogger accelerates from rest to 2.12 m/s in 3.34 s. A car accelerates from 24.1 to 38.6 m/s also in 3.34 s. Find the magnitude of the acceleration of the jogger
A mass moves from rest down an inclined plane with an angle of 60 degrees at the top. find the acceleration of the mass down the ramp
A 900- kg car collides with a 1200- kg car that was initially at rest at the origin of an x-y coordinate system. What was the initial speed of the lighter car
Two identical point charges (q = +6.90 x 10-6 C) are fixed at opposite corners of a square whose sides have a length of 0.45m. A test charge (q0 = -3.20 x 10-8 C), with a mass of 5.20 x 10-8 kg, is released from rest at one of the corners of the s..
A block with mass m =6.4 kg is hung from a vertical spring. When the mass hangs in equilibrium, the spring stretches x = 0.27 m. what is the magnitude of the net force on the block
In a Young's double-slit experiment, the 7th dark fringe is located 0.029 m to the side of the central bright fringe on a flat screen, What is the wavelength of the light being used
A person is trying to practice with their yo-yo. They can throw the yo-yo with initial angular velocity w(initial) = 500 rad/sec. How long does it take yo-yo to spin to rest
In a double-slit experiment, what is the linear distance on the screen between adjacent maxima if the wavelength is 538 nm
The electric potential at a position located a distance of 21.0 mm from a positive point charge of 6.90×10-9C and 16.9 mm from a second point charge is 1.30 kV
q1. a 0.270 kg block on a vertical spring with a spring constant of 5.00 x 103 nm is pushed downward compressing the
Hoursehoe bats use the Doppler effect to determine their location. A horsehoe bat flies towards a wall at a speed of 16.0 m/s while emitting sound of frequency 39.0kHz. What is beat frequency between the emission frequency and the echo? ____________ ..
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