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A 50 kg pole vaulter running at 10 m/s vaults over the bar. Her speed when she is above the bar 1.0 m/s. Neglect air resistance, as well as any energy absorbed by the pole, and determine her altitude as she crosses the bar.
A 35.0-cm-diameter circular loop is rotated in a uniform electric field until the position of maximum electric flux is found. evaluate the magnitude of the electric field
A 85.6-kg wrecking ball hangs from a uniform heavy-duty chain having a mass of 27.0kg, Find the maximum tension in the chain
A light spring-gun projectile launcher is mounted on an 0.613 kg air track glider. What is the speed of the air-track glider after the gun is fired
A 1200 kg ore cart is rolling at 10.8 m/s across a flat surface. A crane dumps 888 kg of ore (vertically) into the cart. How fast does the cart move after being loaded with ore
A small car (m1) is pushing a larger truck (m2) thathas a dead battery. What is the magnitude of the force of the car on the truck
An energy of 0.1 J is stored in the metal ball on top of a Vande Graaff generator. What was the ball's potential relative to ground
A grandfather clock is controlled by a swinging brass pendulum that is 1.2 m long at a temperature of 21°C. What is the length of the pendulum rod
The distortion of Earth's crustal plates is an example of shear ona large scale. A particular crustal rock has a shear modulus of1.0 1010 Pa. What shear stress is involved when a 10.0km layer of this rock is sheared through a distance of 3.5-m?
The distance between the eyepiece and the objective lens in a certain compound microscope is 24.5 cm. compute the overall magnification of the microscope
A 190 pF capacitor is charged to a potential difference of 120 V, and the charging battery is disconnected. The capacitor is then connected in parallel with a second (initially uncharged) capacitor. If the measured potential difference drops to 100 V..
An object is placed in front of a converging lens in such a position that the lens (f = 13.1 cm) produces a real image located 22.0 cm from the lens. What is the image distance of this new image
Three horizontal forces act on a packing crate on a horizontal surface: 600 N to the left, 200 N to the right, and friction. The packing crate remains at rest. The weight of the crate is 400 N. If the 600 N force is removed, the net force acting on t..
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