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What average force is needed to stop a 80kg man running at 4 m/s in a time of .5s?
320N
640N
40N
160N
Calculate the linear speed due to the Earth's rotation for aperson at a point on its surface located at 40 degrees N latitude.The radius of the Earth is 6.40 x 10^6 m
The mass of the Earth is 5.98 ? 1024 kg, and the mass of the Moon is 7.36 ? 1022 kg. Locate the center of mass of the Earth-Moon system as measured from the center of the Earth
A wheel starts to rotate with constant acceleration and in 1minute performs 1000 rotations. Find acceleration and final speed of the wheel
A proton with an initial velocity of (1.0x + 2.0y + 3.0z) x 10^5 m/s enters a megnetic field of 0.50z T. Find the magnitude of the force on the proton. The mass of the proton is 1.67 x 10^-27 kg.
Two stars, with masses m1 and m2 that are initially very far apart and at rest (and even farther from any other stars) are pulled together by their gravitational attraction. Determine their relative speed when they are a distance d apart from one ano..
Eight books, each 3.90 cm thick with mass 1.70 kg, lie flat on a table. How much work is required to stack them on top of each other.
Which container must the restaurant choose - how long does it take each container to lower the coffee temperature from 200 degrees fahrenheit to 130 degrees fahrenheit?
A high-voltage power line carries a current of 110 A at a locationwhere the Earth's magnetic field has a magnitude of 0.59 G andpoints to the north, 72 degrees below the horixontal.
Consider four 8 · µC charges placed at the corners of a square, which is 2.1 ·m on a side. The charges on the top are both positive, Find the electric field at the center of the square
A solenoid is used as a rotor of an electrical motor. It is 10 cm long and 2 cm in diameter. The wire wrapped around it makes 1000 turns and has a resistance of 100 Ohms. find the electrical power delivered by the battery
a uniform electric field with magnitude of 6000 nc passes through a rectangle with sides of 3 cm and 6 cm. what is the
a flat observation screen is placed at a distance of 4.5 m from a pair of slits. the separation on the screen between
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