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A 2.0-kg rock that is initially at rest loses 407J of potential energy while falling to the ground. Calculate the kinetic energy that the rock gains while falling. What is the rock's speed just before it strikes the ground?
A baseball is thrown straight up. The drag force is proportional to.In terms of, what is the y-component of ball's acceleration when its speed is half its terminal speed and it is moving up.
A 7.76 kg crate slides on a horizontal surface. The coefficient of kinetic friction between the surface and the crate is 0.34. find the magnitude of the external force acting on the crate
A rock is thrown vertically upward with a speed of 14.0m/s from the roof of a building that is 50.0 m above the ground. Assume free fall. In how many seconds after being thrown does the rock strike the ground? What is the speed of the rock just befor..
Carbon tetrachloride (n=1.46) is poured into a container made ofcrown glass (n=1.52). what is the angle of the corresponding refracted ray
Calculate the acceleration due to gravity on Neptune. The radius of Neptune is about 2.21 x 107 m and its mass is 1.03 x 1026 kg. m/s2 (downward)
A flat cylindrical grinding wheel is spinning at 2000 rpm (clockwise when viewed head-on) when its power is suddenly turned off. Normally, How much work was done by friction on the system
1. a static magnetic field does no work on a charge moving parallel to the field.2. the direction of the magnetic field
A vertical scale on a spring balance reads from 0 to 160 N. The scale has a length of 12.5cm from the 0 to 160 N reading. A fish hanging from the bottom of spring oscillates vertically at the frequency of 2.30 Hz. ignoring the mass of the spring, wha..
A 0.252-kg volleyball approaches a player horizontally with a speed of 15.3 m/s. What impulse is delivered to the ball by the player
a child pulls an 15 kg- wagon with a horizontal handle whose mass is 1.9 kg accelerating the wagon and handle at 2.5
question a ray of light in air strikes a glass plate n 1.50 at an incidence angle of 500. determine the angles of the
A solenoid of length 13 cm consists of a wire wrapped tightly around a wooden core. The magnetic field strength is 5.0 T inside the solenoid. what does the magnetic field become
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