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A 300 Kg boat is initially moving at a constant velocity.Suddenly, the boat feels a force due to the wind which is directed45 degrees north of east and has a magnitude of 100 N. After 10seconds, the boat is moving at 5 m/s in a direction 30 degreesnorth of east. What was the initial velocity vector of the boat?(Specify magnitude and direction).
A 1.5 solid sphere (radius = 0.20 ) is released from rest at the top of a ramp and allowed to roll without slipping. The ramp is 0.50 high and 5.7 long. what is its rotational kinetic energy
An airplane wing is designed so that the speed of the air across the top of the wing is 220 m/s when thespeed of the air below the wing is 205m/s. The density of the air is 1.29 kg/m3. What is the lifting force on a wing of area 30.0m2?
Suppose 23.8 L of an ideal monatomic gas at a pressure of 2.60 105 kPa is expanded adiabatically (no heat transfer) until the volume is tripled. what is its final temperature after the expansion
A hotel elevator ascends 140 {rm m} with a maximum speed of 4.59 {rm m/s}. Its acceleration and deceleration both have the magnitude of 1.93 {rm m/s^2}. How long does it take to make complete trip from bottom to top.
A car of mass 1790 kg is traveling without slipping on a flat, curved road with a radius of curvature of 34 m. If the car's speed is 15 m/s, illustrate what is the frictional force between the road and the tires?
an automobile tire is inflated with air originally at 10.0degc and normal atmospheric pressure. during the process the
an object is 1m from a screen. at what points may a 0.05-m focal length lens be placed so as to produce a sharp image
string under a tension of 50.5 N is used to whirl a rock in a horizontal circle of radius 2.55 m at a speed of 20.3 m/s on a frictionless surface, What is the breaking strength, in newtons, of the string
In a marathon race Chad is out in front, running due north at a speed of 3.88 m/s. John is 97 m behind him, How long does it take for John to pass Chad
What is the minimum uncertainty in position, in nm, of an electron whose velocity is known to be between 2.30×105m/s
An arrow is shot vertically upward and then 1.84s later passes the top of a tree 40.9m high. How much longer will the arrow travel upward, and how high will it go
A dipole is formed by point charges +3.8 micro Coulomb and -3.8 micro Coulomb placed on the axis at (0.45 m, 0) and (-0.45m, 0), respectively. At what positions on the axis does the potential have the value 7.7×105 V?
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