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A 50 kg ice skater is standing at rest on a frozen lake. The friction is neglected. If he throws a 2.0 kg block of ice horizontally with a velocity of 12 m/s, what is his recoil velocity?
a field goal kicker kicks a field goal in football game. Kicker kicks ball from the ground. Foodball has initial speedof 25 m/s when it leaves the ground. What is speed of ball when it reaches fan
In a pool game, the cueball, which has an initial speed of 7.0 m/s, make an elasticcollision with the eight ball, which is initially at rest. Find the direction of motion of the cue ball
The 9 inch long elephant nose fish in the Congo River generates a weak electric field around its body using an organ in its tail. How many electrons would be required to create that charge
A. What is the maximum frictional force that the ground can exert on the ladder at its lower end? B. What is the actual size of the frictional force when the painter has climbed 1.2417 m along the ladder?
Two electrons in the same atom both have n = 3 and = 1. How many quantum numbers are there for the possible states of the atom?
A car accelerates uniformly from rest and covers a distance of 71 m in 5.6 s. If the diameter of a tire is 42 cm, 1.) Find the angular acceleration of the wheel.
The bucket is released from rest at the top of a well and falls a distance 10.3 to the water. You can ignore the weight of the rope.
A 1.00-cm-high object is placed 4.70 cm to the left of a converging lens of focal length 7.60 cm. Find the position and height of the final image
A small sphere that carries a chargeq is whirled in a circle at the end of an insulatingstring. The angular frequency of rotationis ω. What average current does this rotatingcharge represent?
The drawing shows a uniform horizontal beam attached to avertical wall by a frictionless hinge and supported from below atan angle θ = 38o by a brace that isattached to a pin. The beam has a weight of 338 N.
In a supermarket, you place a 22.3-N (around 5 lb) bag of oranges on a scale, and the scale starts to oscillate at 2.7 Hz. What is the force constant (spring constant) of the spring of the scale\
If a force gauge placed halfway down the rope reads out a constant 2277 Newtons while Magnus pulls the bus a distance of 0.889 meters, how much work does the tension force do on Magnus? The rope is perfectly horizontal during the pull.
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