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An archer shoots a 2.0x10^-2 kg arrow at a target with a speed of 50 m/s. When it hits a target, it penetrates to a depth of 8.6x10^-2 m. What was the magnitude of the average force exerted by the target on the arrow? If the mass of the arrow is doubled, and the force exerted by the target on the arrow remains the same, by what multiplication factor does the penetration depth change?
A spaceship, traveling at 0.56c towards a stationary enemy station, What is the speed of the projectile relative to the station
The crates of weight 1490N will move with speed 2.2m/s at the top of a ramp that slopes downward at an angle 21.0^\circ. The ramp will exert a 533N force of kinetic friction on each crate, and the maximum force of static friction also has this val..
Find the approximate mass of the dark and luminous matter in the Milky Way galaxy. Assume the luminous matter is due to approximately 1011 stars of average mass 1.5 times that of our sun
A certain concrete will support a maximum compressive stress of 1.12 107 N/m2 before being crushed. A column of uniform width is to be made with this concrete. How tall can the column be if the stress in it at any point is not to exceed one fifth the..
A cylinder contains a mixture of helium ans argon gas inequlibrium at a temperature of 150 degrees. What is the average kinetic energy of each type of molecule? What is the rms speed of each type of molecule?
A 4.0-m-long steel wire has a cross-sectional area of 0.050cm^{2}. Its proportional limit has a value of 0.0016 times its Young's modulus. What is the maximum weight that the wire can support
A 67.3 kg sled starts at rest on a horizontal road. The coefficient of kinetic friction between the sled and the road is μk = 0.202. A man pulls the sled a distance 5.07 m along the ground by exerting a constant force of magnitude 532 N on a rope tha..
An electric oscillator is made with a capacitor and a 1.0 mH inductor. The capacitor is initially charged to 5.0 V. Part A What is the maximum current through the inductor as the circuit oscillates?
When burned, 3.7 tons of coal releases the amount of energy that you use over the course of a year in the form of heat. How many tons of coal are required to provide you with your yearly energy use if you were to get that energy from a coal burnin..
You are walking around your neighborhood and you see a child on top of a roof of a building kick a soccer ball. How tall is the building that the child is standing on
A positively charged light metal ball is suspended between two oppositely charged metal plates on an insulating thread as shown below. After being charged once, plates are disconnected from the battery. define the behavior of the ball.
what is its kinetic energy at the end of the interval. How high a tree would a 80 kg person have to climb to increase his gravitational potential energy relative to the ground by that amount.
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