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A hiker, who weighs 934 N, is strolling through the woods and crosses a small horizontal bridge. The bridge is uniform, weighs 3510 N, and rests on two concrete supports, one at each end. He stops one-fifth of the way along the bridge. What is the magnitude of the force that a concrete support exerts on the bridge at the near end?
if the airplane somehow continues to fly as if nothing happend, where is the engine relative to airplane at the moment the engine hits the ground.
You and Maria each own identical spaceships. As you fly past Maria, you measure her ship to be 96m long and your own ship to be 100 m long. How long does Maria measure your ship to be
a particle of mass 110-5 kg has a negative charge of -10 c. it moves in a clockwise circular pattern of radius 2m at a
A 10-kg crate is placed in the bed of a truck at rest on horizontal ground. The truck accelerates uniformly at 1 m/s^2for 10 seconds. What is the sign of the work done on the crate
During a 75-ms interval, a change in the current in a primary coil occurs. This change leads to the appearance of a 6.3-mA current in a nearby secondary coil. What is the change in the primary current
Suppose a car is traveling at +21.1 m/s, and the driver sees a traffic light turn red, What is the stopping distance of the car, as measured from the point where the driver first notices the red light
moves through its horizontal position at (B) and up to (C) where it stops with 2 = 109.0o, and then falls back down. Friction at the pivot is negligible. Compute the speed of the CM at (B).
A steel ball is dropped onto a hard floor from a height of 1.55 m and rebounds to a height of 1.45 m. (Assume that the positive direction is upward.) Calculate its velocity just before it strikes the floor
Calculating magnetic flux, induced current & magnetic field.
Equipment to be used in airplanes or spacecraft is often subjectedto a shake test to be sure it can withstand the vibrations that maybe encountered during flight. Find the radio's maximum speed
a force of 8n acts on an object on a frictionless horoizontal surface. the force acts in a vertical plane at an angle
Assume that a cement truck with a mass of 10,000 kg hits you while you were stopped at a traffic light, and that you are driving a Yugo with a mass of 750 kg. If the truck was traveling at 15 mph and the crash makes you stick together (you and the..
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