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The wing of an airplane has an average cross-sectional area of 11 m2 and experiences a lift force of 91,000 N. What is the average difference in the air pressure (in N/m^2) between the top and bottom of the wing?
A mass (3kg) on a string lies on a horizontal frictionless surface tied to a central point. How fast can the mass move around the circle without breaking the string
A 7.0 kg ball with the initial velocity of (7i+5j)m/s collides with a wall and rebounds with a velocity of (-7i+5j)m/s. what is the impulse exerted on the ball by the wall
A daredevil decides to jump a canyon. Its walls are equally high and 10 m apart. What minimum speed must he have in order to clear the canyon
Many 2.5-in-diameter (6.35 cm) disks spin at a constant 7200 rpm operating speed. The disks have a mass of about 7.5 g and are essentially uniform throughout with a very small hole at the center. If they reach their operating speed 2 s after being..
A ball having amass of 150 g strikes a wall with aspeed of 4.8 m/s and rebounds withonly 50% of its initial kinetic energy. What is the magnitude of the impulse on the wall from the ball
A converging lens (f = 28.0 cm) is utilized to project an image of an object onto a screen. The object and screen are 124 cm apart, and among them the lens can be placed at either of two locations.
A particle of mass 4m is placed 0.91 meter from a particle of mass m. Determine where should you put a third mass M so that the net gravitational force on M due to the two masses is exactly zero
an artillery shell is fired with an initial velocity of 300 ms at 55.0deg above the horizontal. to clear an avalanche
the central maximum of a single-slit diffraction pattern has a width of 2.00 cm when measured on an observing screen
If the radius of a planet is larger than that of Earth by a factor of 9.86. How much bigger is the volume of the planet than Earth's
While skiing in Jackson, Wyoming, your friend Ben (of mass 84.3 kg) started his descent down the bunny run, 27.7 m above the bottom of the run. If he started at rest and converted all of his gravitational potential energy into kinetic energy, what is..
A 1300- {rm N} crate slides 15- {rm m} down a ramp that makes an angle of 35^circ with the horizontal. If the crate slides at the constant speed, how much thermal energy is created.
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