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A golf ball is struck off a tee (negligible height and air resistance) with initial velocity of 50 meters per second at an angle of 30 degrees above the horizontal. What will be the vertical component of velocity after 2.5 seconds?
An airplane is flying with a velocity of 90 at an angle of 22 above the horizontal. When the plane is a distance 122 directly above a dog that is standing on level ground, a suitcase drops out of the luggage compartment.
A 9.40kg projectile is fired vertically upward. Air drag decreases the mechanical energy of the projectile-Earth system by 69.5kJ throughout the projectile's ascent. How much higher would the projectile have gone were air drag negligible.
A 150g ball and a 250g ball are connected by a 34cm long, massless, rigid rod. The balls rotate about their center of mass at 130 . what is the speed of ball of 150 g.
A child of mass 24 kg sits 2.10m to the left of the center of a seesaw. The mass of the seesaw is 35 kg. How far to the right of the central pivot must a second child of mass 40 kg sit if the seesaw is to be perfectly balanced.
A train is travelling up a 4.5 degree incline at a speed of 3.25 m/s when the last car breaks free and begins to coast without friction. a) How long does it take for the last car to come to rest momentarily? b) How far did the last car travel befo..
The specific heat of a certain 50 g metallic block is 900 J/kg K. If the block is at an initial temperature of 80 degrees Celsius, and dropped into a 50 g bucket of water at 1 degree Celsius, Find the final temperature of the system
A runner of mass m runs around the edge of the horizontal turntable mounted on a vertical, frictionless axis through its center. The runner's velocity relative to earth has magnitude v.
Barometric pressure in the eye of a hurricane is 0.91atm (27.2 in of mercury). How does the level of the ocean surface under the eye compare with the level under the distant fair-weather region where the pressure is 1.0atm.
A car accelerates from rest to a kinetic energy of 2.06 x 105 J in a distance of 638 m. How much force did the car's engine deliver to produce this acceleration.
If a person radiates about 66 W of power at room temperature, how long does it take for person to radiate away the energy acquired by consuming a 230 Calorie doughnut.
Suppose the second distance d were traveled in the opposite direction; you forgot something and had to return home at the same constant speed as found in part (a). What is the average velocity for this trip.
A motorboat heads due east 13.3 m/s across a river that flows toward the south at a speed of 4.5m/s. Illustrate what is the magnitude of the resultant velocity relative to an observer on the shore?
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