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a 2.0-kg rock that is initially at rest loses 407-J 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 hitting the ground.
A charge of -4.02 mC is fixed inplace. From a horizontal distance of 0.958 m, a particle of mass9.27 x 10-5kg, How far does the particle travel before its speed is zero
Water flows in a pipe that has a 4 ft diameter and the following hypothetical velocity distribution: what is the discharge in cubic feet per second
A 2 kg mass is attached to a spring of spring constant 20 N/m. What is the period of mass and spring oscillation
a person having a spherical shape with mass m has a center of mass a distance h above a thin infinite sheet of mass
The block starts at the top of the wedge at 1.2 m. Find out the final speeds of a block and the wedge once the blook has slid to the bottom.
A 1.23-kg box slides up an incline plane with a speed of 8.6 m/s. how long will it take for the box to come to rest
a bottle of bleach is opened in a closed room where the air is perfectly still. estimate how long it will take for the
A cosmic-ray proton is moving at such a speed that it can travel from the Moon to Earth in 1.5s. At what fraction of the speed of light is the proton moving
You observe that a falling stone takes 0.21 seconds to pass a window that is 1.6 meters tall. What is the speed of the stone as it reaches the bottom of the window
The power crossing a surface perpendicular is equal to the intensity at the surface times the area of the surface. Since the source emits uniformly in all directions, the light intensity is the same at all points on the imaginary spherical surface..
If a 1.00 kg body has an acceleration of 8.29 m/s2 at 79° to the positive direction of the x axis, what is the net force in unit-vector notation
A person who is cycling with initial velocity of 12 m/s brakes hard locking wheels they slide to a stop their mass is 70kg and their bike is 5kg. how far do they travel before they stop
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