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A hockey puck is sliding along the ice with nearly constant momentum ‹ 3, 0, 3 › kg · m/s when it is suddenly struck by a hockey stick with a force ‹ 0, 0, 1650 › N that lasts for only 4 milliseconds (4×10-3) s. What is the new momentum of the puck?
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A projectile is launched at an angle of 13.0° above the horizontal. What is its initial speed if it hits a target that is located a horizontal distance of 155 m from the launch point and 10.5 m below the launch level?
Question: A person stands on a scale in an elevator. As the elevator starts, the scale has a constant reading of 584 N. As the elevator later stops, the scale reading is 398 N. Assume the magnitude of the acceleration is ...
Question: A series RLC circuit of R = 200 ohm, L = 0.900 H and C = 2.00 uF carries an rms current of 0.250 A with a frequency of 100 Hz. (a) What is the average rate at which electrical energy isconverted to heat in the ...
Question: A standard 100 W (120 V) lightbulb contains a 9.00cm -long tungsten filament. The high-temperature resistivity of tungsten is 9.0 x 10^- 7 Ωm. What is the diameter of the filament? Express your answer with the ...
Question: A proton is released from rest at the positive plate of a parallel-plate capacitor. It crosses the capacitor and reaches the negative plate with a speed of 50,000 m/s. What will be the final speed of an electro ...
Question: The particle travels along the path defined by the parabola y = 0.5x2. If the component of velocity along the x axis is vx = (7t) ft/s, where t is in seconds, determine the particle's distance from the origin O ...
Question: A stone is thrown vertically upward with a speed of 24.0m/s. a) how fast is it moving when it is at a height of 13.0m? I got 17.9 m/s b) How much time is required to reach this height? I got 4.28s and 6.20s c) ...
Question: To take off from the ground, an airplane must reach a sufficiently high speed. The velocity required for the takeoff, the takeoff velocity, depends on several factors, including the weight of the aircraft and t ...
Quesiton: A rock is tossed straight up with a velocity of 20m/s When it returns, it falls into a hole 10 m deep. What is the rock's velocity as it hits the bottom of thehole? How long is the rock in the air, from the ins ...
Question: A roller coaster car crosses the top of a circular loop-the-loop at twice the critical speed. What is the ratio of the car's apparent weight to its true weight? The response must be typed, single spaced, must b ...
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