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a 5,48 kg ice skater is moving at 3.94 m/s when she grabs the looseend of a rope, the opposite end of which is tied to a pole .shethen moves in a circle of radius 0.803 m around.
(A) determine theforce exerted by the horizontal rope on her arms N
(B) What is the ratio of this force to her weight?
a ball rolls off a platform that is 7 meters above the ground. the balls horizontal velocity as it leaves the platform
The force exerted to a robot arm from a motor is given as a function of position F = 1.50 + 20.0 x2 (N), How much work is done by the motor when the position of the arm is moved from x = 0.200 m to x = 0.750 m
A city employee wanted to measure the height of a tall tree. The employee stood 9.50 m from the base of the tree; and he saw that his line of sight made an angle of 65.2 degrees above the horizon,
Many people mistakenly believe that the astronauts orbiting the earth are "above gravity." Compute the acceleration because of gravity, g, for space shuttle territory, 245 kilometres above the earth's surface (dashed line in sketch). Earth's mass ..
A spaceship travels at constant velocity from Earth to a point 745 ly away as measured in Earth's rest frame. The ship's speed relative to Earth is 0.9996c. How old is the passenger when the ship reaches its destination
two identical capacitors store different amounts of energy capacitor a stores 1.4 x 10-3 j and capacitor b stores 4.7 x
If the spring of a jack-in the-box is compressed, a distance of 8.00cm from its relaxed lenght and the released, what is the speed of the toy head is 50.0g the spring constant is 80.0N/m, and the toy head moves only in the vertical direction.
A small ball of mass 0.60 kg is attached to one end of a 1.15 m long massless rod, and the other end of the rod is hung from a pivot
Sound is coming through an open window whose dimensions are 1.1 m x 0.75 m. How much sound energy comes through the window in one hour
A car manufacturer claims that you can drive their new vehicle across a hill with a 47 degree slope before the vehicle starts to tip. If the car is 2.0 m wide, how high is its center of gravity?
A 100 percent efficient electric motor is lifting a 15N weight at 25cm/s. If the motor is connected to a 7V battery, how much current does it draw.
q1. a diffraction grating with exactly 1000 lines per centimeter is illuminated by a he-ne laser of wavelength 683
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