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A 103 kg fullback runs at the line of scrimmage. A constant force of 3399 N must be exerted on him to bring him to rest in a distance of 1.2 m in a time interval of 0.27 s. How fast was he running initially?
A child slides down a snow-covered slope on a sled. At the top of the hill, her mother gives her a push at a speed of 1.5 m/s to get her started. find the angle that the hill makes with the horizontal
A uniform 3.15-kg rope 25.6 m long lies on the ground at the top of a vertical cliff. What was the change in potential energy of the rope during this maneuver
Microcontrollers usually do not include D/A converters but you can easily create a crude version of one usually signle digital I/O pin. This can be done by outputting a variable-width pulse train to an RC circuit.
An infinitely long solenoid of radius 2.5cm and 100 turns/cm carries an initial current of 1 A. what is the electromotive force induced in the loop
What are the two types of errors one encounters in experiments? Give an example of each, What does standard deviation of measured data tell you
An ideal fluid in a pipe of diameter 14cm is moving at 6.0 m/s. If the incompressible fluid density is 1.05g/cc, what is the flow rate in kg/s and what is the speed of flow if the pipe narrows to 4.0cm radius?
Two carts A and B of equal mass mA = mB = 0.622 kg are on an air track. Cart A is moving with speed vi = 0.95 m/s towards cart B which is at rest. What is the work done by non-conservative forces
An archer pulls her bow string back 0.380 m by exerting a force that increases uniformly from zero to 219 N. How much work is done in pulling the bow
question 1. draw a picture of a moving source and the waves surrounding it according to what you observed in this
A spring stretches by 0.0241 m when a 4.15-kg object is suspended from its end. How much mass should be attached to this spring so that its frequency of vibration is f = 4.44 Hz
plane flies at 1.13 times the speed of sound. Its sonic boom reaches a man on the ground 0.99 min, What is the altitute of the plane
A spaceship of mass 2.30×106kg is cruising at a speed of 6.00×106m/s when the antimatter reactor fails, blowing the ship into three pieces. What is the speed of the third piece
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