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Suppose the skateboarder shown in the drawing reaches a height of2.30 m above the right side of the semicircular ramp. He then makesan incomplete midair turn and ends up sliding down the right sideof the ramp on his back. When the skateboarder reaches the bottom of the ramp, his speed is 5.90 m/s. The skateboarder's mass is 58.0kg, and the radius of the semicircular ramp is 2.00 m. What is the average frictional force exerted on the skateboarder by theramp?
A golf ball is dropped from rest from a height of 9.50 m. It hits the pavement, then bounces back up, rising just 5.50 m before falling back down again. A boy then catches the ball when it is 1.30 m above the pavement. Ignoring air resistance, cal..
you are moving into an apartment and take the elevator to the 6th floor. suppose your weight is 663 n and that of your
A small ball is thrown horizontally out of a window 7.50 m above the ground. With what speed was it thrown
A 54.5 g ice cube, initially at 0°C, is dropped into a Styrofoam cup containing 363 g of water, initially at 21.2°C. What is the final temperature of the water
A 500kg helicopter ascends from the ground with an acceleration of 2.00m/s^2 over a 5.00second interval, what is the work done by the gravitational force
a wave with frequency 2000hzand wavelength 0.1m in some certain medium what is its speed in this
An electron in the hydrogen atom is in an excited state given by (n=4, l=3, ml=2, ms=1/2). List the possible final states the system could be in after the emission of photon. Include in the list the energies of the photon.
The place you get your hair cut has two nearly parallel mirrors 7.00 apart. As you sit between these mirrors in the chair, your head is 2.50 from the mirror in front of you. How far away does the back of your head appear to be
A specimen of oil having an initial volume of 600cm3 is subjected to a pressure increase of3.6×106Pa, What is the bulk modulus (in Pa) of the material
The lander is 8.2 meters above the surface and has the downward speed of 0.89 m/s while the engine is cut off. What is the speed of the lander just before it touches the surface.
An electric field of 490000 N/C points due west at the certain spot. What is the magnitude of the force that acts on a charge of -8.3 C at this spot.
The position of a cart that is oscillating on a spring is given by the equation x= 12.3 cm cos [(1.26 s-1)t] . When t= .805s , what are the (a) velocity and (b) acceleration of the cart ?
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