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Suppose that you care called by a lawyer to give advice concerning the physics involved in a case. The question is whether a driver was exceeding 50 km/h before he made an emergency stop, with the brakes locked and the car sliding. The length of the skid marks was 5.85 m. A police officer made a reasonable assumption that a car can slow down with an acceleration of 9.80 m/s2. Based on this assumption, what was the initial speed of the car and was the driver speeding?
Starting from rest, a basketball rolls from the top of a hill to the bottom, reaching a translational speed of 3.60 m/s. Ignore frictional losses. What is the height of the hill?
A space vehicle is traveling at 4150 km/h relative to the Earth when the exhausted rocket motor is disengaged, What is the speed (km/h) of the command module relative to Earth after the separation
Take a spring and cut it in half. What can you say about the spring constant of the smaller springs relative to the original one? Explain
A 26.2-kg dog is running northward at 3.24 m/s, while a 5.30-kg cat is running eastward at 2.49 m/s. Find the direction and magnitude of the owner's velocity
A 0.4-kg object is traveling to the right (in the positive direction) with a speed of 2 m/s. obtain the magnitude of the impulse (in N-s) acting on the object
What is the bandwidth of the grating in nm? What is the Reflectivity (in %) and Transmission (in dB)? Will this grating be any good for filtering unpolarized light?
The deepest known point in the ocean is 11,034 m in the Mariana Trench in the Pacific. Assuming sea water to have a constant density of 1050 kg/m3, determine the pressure at this point in atmospheres.
The electrical power output of a large nuclear reactor facility is 890 MW. It has a 34.0% efficiency in converting nuclear power to electrical. What is the nuclear power output in megawatts
A single-turn current loop, carrying a current of 5.67 A, is in the shape of a right triangle with sides 62.8, 114, and 130 cm. The loop is in a uniform magnetic field of magnitude 64.6 mT whose direction is parallel to the current in the 130 cm s..
it is claimed that some professional baseball players can see which way the ball is spinning as it travels toward home
Electrons are ejected with a maximum velocity of 5.1 x 105 m/s from a metal when illuminated by photons with a wavelength of 440 nm. calculate The energy of the incident photons
q1. a street lamp weighs 158 n. it is supported equally by two wires that form an angle of 104 degrees with each other.
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