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If I want see the damage that an object, (for example a bowling ball) can cause on a sheet of plywood. Would the impact be the same if a trow the ball at the sheet of wood white standing perpendicularly as if we hold the sheet horizontally and throw the bowling ball at it from the top?Would the acceleration of the ball be different?A friend that tells me he used to be a physics teacher says that it is irrelevant if the wood is standing up or being laid horizontally, that the amount of damage to the sheet would be the same. Can you sort this out for us?
A 212 kg log is pulled up a ramp with means of a rope that is parallel to the surface of the ramp. The ramp is inclined at31.7° with respect to the horizontal. The coefficient of kinetic friction among the log and the ramp is 0.903, and the log has a..
Two hollow metal spheres are concentric with each other. The inner sphere has a diameter of 0.40 m and is at a potential of 105 V. Find the electric energy contained in the space between the spheres
A point source of light is submerged 2.0 m below the surface of a lake and emits rays in all directions. On the surface of the lake, directly above the source, the area illuminated is a circle. What is the maximum radius that this circle could have?
Unpolarized white light is incident on a po- larizer and then falls on an analyzer whose TA makes an angle of %u03B8 = 33.8%u25E6 with the polarizer, What is the fraction of the original light transmitted through both the polarizer and analyzer
three guns are aimed at the center of a circle and each fires a bullet simultaneously. the directions in which they
When jumping straight down, you can be seriously injured if you land stiff-legged. find the average net force that acts on him during this time
Six mass pieces of 100g each are placed on a mass holder of 140g which is hung from a string. Analyse the tension in the string.
While exercising, the following physiological changes occur for a certain person. His systolic pressure increases by 46 %. Which change has the strongest effect on blood flow
A person weighing 500 N climbs a ladder leaning against awall. The ladder weighs 100 N and is 2.00 M long, How high does the person get before this begins to happen
A football is thrown with an initial upward velocity component of 15.0 and a horizontal velocity component of 17.5 . How high does it get above the ground? How far has the football traveled horizontally from its original position?
The tub of a washer goes into its spin-dry cycle, startingfrom rest and reaching an angular speed of 4.0 rev/s in 7.0 s. Through how many revolutions does the tub turn
The longest pass in NFL history is approximately 86.9 m. Ignoring the effects of air resistance, what must have been the initial speed of the football
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