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A set of crash tests consists of running a test car moving at a speed of 12.4 m/s (27.7 mi/hr) into a solid wall. Strapped securely in an advanced seat belt system, a 57.0 kilogram (126lbs) dummy is found to move a distance of 0.720 meter from the moment the car touches the wall to the time the car is stopped. Find the size of the average force which acts on the dummy during that time.
Using the direction of motion as the positive direction, find the average acceleration of the dummy during that time (in g's, with 1g =9.81m/s2).
In a different car, the distance the dummy moves while being stopped is reduced from 0.720 m to 0.270 m, Find the average force on the dummy as that cars tops.
A red ball is thrown down with an initial speed of 1.1 m/s from a height of 29.0 meters above the ground. Then, 0.6 seconds after the red ball is thrown, What is the maximum height the blue ball reaches
Find the magnitude of the electric force between two protons separated by 1 femtometer (10?15 m), approximately the distance between two protons in the nucleus of a helium atom
A simple pendulum is constructed from a mass of 2 kg and a massless string of length 3.5 m. The pendulum is pulled 5.5 cm to the right and released to start the motion. What is the period of the pendulum
Consider the following reaction: where has a mass of 14.003 074 u; has a mass of 12.000 000 u; d has a mass of 2.014 102 u; How much energy is released in this reaction
it is believed that a large electric fish known as torpedo occidentalis uses electricity to shock its victims. a
When a battery is connected to the plates of a 2.00-µF capacitor, it stores a charge of 30.0 µC. What is the voltage of the battery
Consider three identical metal spheres, A, B, and C. Sphere A carries a charge of +10q. Sphere B carries a charge of -7q. Sphere C carries no net charge. How much charge ends up on sphere C
A wagon wheel with spokes is mounted on a vertical axis therefore it is free to rotate in the horizontal plane. Find how far can the bug crawl along the spoke before it starts to slip
A mass m1 = 1 kg rests on top of a mass m2 = 5 kg which is attached to a spring (k = 50 N/m), Determine the maximum amplitude of the motion such that the top mass does not slip
Illustrate what is the maximum mass, m1, that can be hung from the chords before the 5.0kg mass just begins to move?
A car is travelling at a constant speed of 32m/s on a highway. At the instant this car passes an entrance ramp, a second car enters the highway from ramp.
The depth of the potential well for free electrons in a metal can be accurately determined by observing that the photoelectricwork function is the energy necessary to remove an electron at thetop of the occupied states from the metal;
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