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An elevator is moving downward but has a constand upwardacceleration of a=3.5m/s2. At a moment when the elevator speed is vEL=2.3m/s downwards, a person, standing in the elevator, releases acoin fom a heigh of h=1.25m above the floor
a) what would a postion time graph look like for the elelvatorand coin
b) how long dose it take the coin to strike the elevatorfloo?
What is magnitude of the net force on the student
A particle moves along the x axis. Its position is given by the equation x = 2.1 + 2.9t ? 3.5t2with x in meters and t in seconds. Determine its position when it changes direction
The tires of a car make 86 revolutions as the car reduces its speed uniformly from 88.0 km/h to 60.0 km/h. What is the angular acceleration of the tires in rad/s^2
An 85.2kg propeller blade measures 2.23m end to end. Model the blade as a thin rod rotating about its center of mass. Find the tangential speed at the blade tip
A positron (q = +e) movesat 5.4 107 m/s in a magneticfield of magnitude 0.51 T.The magnetic force on the positron has magnitude 1.5 10-12 N.
A test charge of +2 micro C is placed halfway between a charge of +6 micro C and another +4 micro C sperated by 10cm. what is the magnitude of the force on the test charge
Why is the normal force of an object zero at the top of a hill (such as the hill of a roller coaster)? I'm doing a circular motion unit and I found a few problems where this is the case, and I was wondering how it works.
When a potential difference of 168V is applied to the plates of a parallel-plate capacitor, the plates carry a surface charge density of34.0nC/cm2. What is the spacing between the plates?
At its Ames Research Center, NASA uses its large "20-G" centrifuge to test the effects of very large accelerations (hypergravity) on test pilots and astronauts. In this device, an arm 8.84m long rotates about one end in a horizontal plane, and the..
A 50-m length of wire is stretched horizontally between two vertical posts, Find the magnitude of the earth's magnetic field at the location of the wire, assuming the field makes an angle of 67.0° with respect to the wire
A moderate wind accelerates a pebble over a horizontal xy plane with a constant acceleration = (5.80 m/s2) + (7.00 m/s2). At time t = 0, the velocity is (3.6 m/s). What are magnitude and angle of its velocity when it has been displaced by 12.6 m para..
A car travels due East with a speed of 33.5 km/h. Rain is falling vertically with respect to the Earth. Find the velocity of the rain with respect to the car
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