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To measure the speed of a bullet, the following situation is setup. A wooden block(m=0.50kg) is put on top of a fencepostwith a height of 1.5m. The bullet (m=.010kg) strikes theblock from a perfectly horizontal direction and remains embedded init. The block is measured to fall 1.6m from the base of thepost. How fast was the bullet going?
A shopper walks from the door of the mall to her car 310m down the lane of cars, then turns 90° to the right and walks an additional 70m. What is the magnitude of the displacement of her car from the mall door.
A 15 kg block is accelerated at 1.7 m/s2 up a frictionless plane inclined at 5.0° to the horizontal, find the change in the block's mechanical energy
A capacitor is completely charged with 670 nC by a voltage source that had 275 V. It's capacitance is 2.44nF. What is the stored energy if the air gap is now 4 mm
what is the mass of the earths atmoshere (the radius of the earth is 6.37 x 10^6 m, and atomosheric pressure at the surface is 1.013 x 10 ^5 N/m^2)
A large balloon of mass 233 kg is filled with helium gas until its volume is 327 m3. Assume the density of air is 1.29 kg/m3, Calculate the buoyant force acting on the balloon
A disk7.97cm in radius rotates at a constant rate of1160rev/min about its central axis. Determine the radial acceleration of a point on the rim
A solenoid 1.30 m long and 2.70 cm in diameter carries a current of 12.0 A. The magnetic field inside the solenoid is 15.0 mT. Find the length of the wire forming the solenoid
When jumping straight down, you can be seriously injured if you land stiff-legged. In a stiff-legged landing he comes to a halt in 2.5 ms. Find the average net force that acts on him during this time
At Water-Country NH there is a ride called the "Double Geronimo" which is described as an "Extreme Body Slide". how fast would the rider be moving at the bottom of the slide
A sled with mass 7.80 moves in a straight line on a frictionless horizontal surface. find the force acting on the sled
q1. a street lamp weighs 158 n. it is supported equally by two wires that form an angle of 104 degrees with each other.
A discus thrower (with arm length of 1.2 m) starts from rest and begins to rotate counterclockwise with an angular acceleration of 1.8 rad/s2. (a) How long does it take the discus thrower's speed to get to 3.5 rad/s?
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