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A government agency estimated that air bags have saved over 14,000 lives as of April 2004 in the United States. (They also stated that air bags have been confirmed as killing 242 people, and they stress that seat belts are estimated to save 11,000 lives a year.) Assume that a car crashes and has come to a stop when the air bag inflates, causing a 75.0 kg person moving forward at 15.0 m/s to stop moving in 0.0250 seconds.
(a) What is the magnitude of the person's impulse?
(b) What is the magnitude of the average force the airbag exerts on the person?
Whenever two Apollo astronauts were on the surface of the Moon, a third astronaut orbited the Moon. Determine the astronaut's orbital speed
A satellite moves in a circular orbit around Earth at a speed of 5047 m/s. Determine the satellite's altitude above the surface of Earth
A ball is thrown at an initial velocity of 105 mph upward at a roof. The ball is thrown a distance of 100 ft from the building. The building is 525 ft tall. Will the ball reach the roof
A parallel-plate capacitor with circular plates of radius R is being charged. The change of electric field is given by dE/dt=1.5E12 V/(mS). The field magnitude B for r=5R is 1E-7 T.
A student sees a newspaper ad for an apartment that has 1630 square feet (ft2) of floor space. How many square meters of area are there
Forces are vector quantities with units of Newtons (N); 9.8 N of force are required to support 1.0 liter of water near the surface of the Earth. In this question, you eventually have to add three forces acting on a particular object so as to find ..
A spherical water drop, 1.20 ?m in diameter, is suspended in calm air owing to a downward-directed atmospheric electric field E = 432 N/C. What is the weight of the drop
The pilot of an aircraft wishes to fly due west in a 37.70 km/h wind blowing toward the south. The speed of the aircraft in the absence of the wind is 191 km/h.
A box of well called as breakfast cereal states that one small portion of the cereal contains 110 Calories (1 Cal = 4186 J). If 2.0 percent of this energy could be converted by a weight lifters body into work completed in lifting a barbell.
A force platform is a tool used to analyze the performance of athletes measuring the vertical force that the athlete exerts on the ground as a function of time. What impulse did the athlete receive from the platform
Object A is moving due east, while object B is moving due north. They collide and stick together in a completely inelastic collision. Momentum is conserved. Find the direction of the final velocity of the two-object system
Light is incident on a thin prism for which n= 1.5. Find the angle of deviation for the emerging beam
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