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1. A lead ball is dropped into a lake from a diving board 5.0 mabove the water. After entering the water, it sinks to the bottom with a constant velocity equal to the velocity with which it hit the water. The ball reaches the bottom 3.0 s after it is released.How deep is the lake?
2. Mary needs to row her boat across a 100 m wide river that is flowing to the east at a speed of 1.0 m/s. Mary can row the boat with a speed of 2.0 m/s relative to the water.a) If Mary rows straight north, how far down stream will she land?b) Draw a picture showing Mary's displacement due to rowing, her displacement due to the river's motion, and her net displacement.(If you can)
What percentage of error in would be made if the moment of inertia of the pulley were avoid? Ignore friction in the pulley bearings.
Consider the circuit in the figure below with resistors R1 = 2,400 ?, R2 = 4,400 ?, and R3 = 1,100 ?, What is the magnitude of the current in the circuit
questionan anchored barge that extends across a canal by distance d 30 m and into the water by distance b 12 m. the
One of the most powerful cranes in the world operates in Switzerland. If it takes 1.00 min to lift the load at constant velocity to this height, find the power developed by the crane
tom twirls a ball of 0.15 kg on a string in a horizontal circle of radius 0.4 m. the ball travels once around the
A race track isconstucted such that two arcs of radius 35.0m and 70.0m are ateither end and joined by straight track. Find the centripetal force the diriver feels around the 70.0mcurve
The solar wind is a thin, hot gas given off by the sun. Charged particles in this gas enter the magnetic field of the earth and can experience a magnetic force.
A fluid in an insulated, flexible bottle is heated by a high resistance wire and expands. If 9kJ of heat is applied to the system and it does 5kJ of work, how much does the internal energy change?
a 20 kg satellite has a circular orbit with a period of 2.7 h and a radius of 8.1 x 106 m around a planet of unknown
A .005 kg block having a velocity of 500 m/s hits a 5 kg wooden block at rest on a horizontal at an angle of 30 degrees from the horizontal
A(n) 1340 kg car moving with a speed of 16.6 m/s collides with a utility pole and is brought to rest in 0.299 s
a 0.145-kg baseball pitched at 37.0 ms is hit on a horizontal line drive straight back toward the pitcher at 50.5 ms .
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