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Two children who are bored while waiting for their flight at the airport decide to race from one end of the 20 -long moving sidewalk to the other and back. Phillippe runs on the sidewalk at 2.0 (relative to the sidewalk). Renee runs on the floor at 2.0 . The sidewalk moves at 1.5 relative to the floor. Both make the turn instantly with no loss of speed.
A 20.0-kg package is dropped from a high tower in still air and is "tracked" by a radar system. Determine the force of air resistance on the package
Two crates connected by a rope of negligible mass lie on a horizontal surface. Create A has mass mA and crate has mB. calcuate the tension in the rope connecting the block
A very small charged block with a mass of 2.35 g is placed on an insulated, frictionless plane inclined at an angle of 17.0° with respect to the horizontal, find the sign and magnitude of the charge on the block
A 50 gallon buoy is tied to the bottom of a still lake by a rope. 26% of its volume is below water. What is the buoyant force on the buoy
A proton is released from rest at the positive plate of a parallel-plate capacitor. What will be the final speed of an electron released from rest at the negative plate
A mass of 150 g of hot coffee at 90.0 oC is poured into an insulated cup containing 220 g of ice initially at 0.0 oC. how much ice will remain
q. suppose that you hear a clap of thunder 15.90 s after seeing the associated lightning stroke. the speed of sound
Find out the net force exerted on the fluid inside the box by summing momentum flow rates out through each of four sides of the box.
q1. a 0.850 kg block is attached to a spring with spring constant 16.0 nm. while the block is sitting at rest a student
One possibility for a low-pollution automobile is for it to use energy stored in a heavy rotating flywheel. What is the angular velocity of the flywheel when it has a full "energy charge"
Two forces, of magnitude F1 = 80.0 N and F2 = 45.0 N, act in opposite directions on a block which sits atop a frictionless surface. Find the work W1 done on the block by the force of magnitude F1= 80.0 N as the block moves from xi = -1.00 cm to xf =..
An athlete whirls a 7.49 kg hammer tied to the end of a 1.3 m chain in a horizontal circle. What is the centripetal acceleration of the hammer
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