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A bicycle tire rolls down a 25 m hill and crashes into a car door. If the tire has a mass of 1.25 Kg with a 0.75 m radius and the door has a mass of 100 Kg, how fast did the tire collide with the door?
A 1 200-N uniform boom at f 5 65° to the horizon- tal is supported by a cable at an angle u 5 25.0° to the horizontal, calculate the tension in the support cable
A spring (k = 866 N/m) is hanging from the ceiling of an elevator, and a 7.3-kg object is attached to the lower end. By how much does the spring stretch
A 1.83 kg book is placed on a flat desk. Suppose the coefficient of static friction between the book and the desk is 0.542, How much force is needed to keep the book moving at constant speed once it begins moving
A person stands on a scale in an elevator. As the elevator starts, the scale has a constant reading of 590 N. Determine the magnitude of acceleration of the elevator
44.3 kg of ice is melted into water then raised to a temperture of 354.8 K. How much energy is needed to complete this process
A 1150 W carbon-dioxide laser emits light with a wavelength of 10 µm into a 3.0-mm-diameter laser beam. What force does the laser beam exert on a completely absorbing target
A jet airplane is in level flight. The mass of the airplane is m = 8830 kg. What is the magnitude of the lift force acting on the plane
At the instant a ball rolls off a rooftop it has a horizontal velocity component +12.0m/s of and a vertical component (downward) of 10.0m/s, What is the ball's speed as it leaves the roof
A 70-kg astronaut is space-walking outside the space capsule and is stationary when the tether line breaks. As a means of returning to the capsule he throws his 2.0-kg space hammer at a speed of 14 m/s away from the capsule.
A football punter accelerates a football from rest to a speed of 13 m/s during the time in which his toe is in contact with the ball. what average force does the punter exert on the ball
A centrifuge is a device in which a small container of material is rotated at a high speed on a circular path. How many revolutions per minute is the sample making
The rope makes an angle of 70.0 degrees with respect to the vertical as shown. Illustrate what is the tangential speed of the ball?
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