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At an accident scene on a level road, investigators measure a van's skid mark to be 86 meter long. It was a rainy day and the coefficient of kinetic friction was determined to be 0.44. Use these data to estimate the speed of the van when the driver slammed on (and locked) the brakes (g = 9.8 m/s2).
m/s
A rock appears to be 7m below the surface of a lake, whenviewed directly from above. What is the actual depth of the rock
A speedboat starts from rest and accelerates at +2.01 m/s2 for 7.00s. At the end of this time, the boatcontinues for an additional 6.00s with an acceleration of +0.518m/s2. Following this, the boat accelerates at -1.49m/s2 for 8.00s.
Earth-Moon Center of Mass The Earth has a mass of 5.98×1024kg, the Moon has a mass of 7.35×1022kg, How far from the center of the Earth is the Earth-Moon center of mass
Suppose a modified Joule's apparatus contains 2.8 kg of water. instead of the ropes having weights on the end, the apparatus is turned by exerting a constant horizontal force of 40 N on a heavy cord wrapped around the axle.
A soprano sings the note C6 (1046 Hz) across the mouth of a soda bottle. To excite a fundamental frequency in the soda bottle equal to this note, describe how far the top of the liquid must be below the top of the bottle
The first order line of 589 nanometer light falling on a diffraction grating is observed at 15.5o. Compute how far apart are the slits
A plane is flying southwest at 155 mi/h and encounters the wind from the west at 45mi/h? what is the planes new velocity with respect to the ground in standard position.
A 55.8 kg person rides a sled 15 meters along a hillside that is inclined at 25 degrees above the horizontal. what is the person's speed upon reaching the bottom
A large storage tank is filled to a height 88 cm. The tank is punctured with a small hole at a height 21 cm from the bottom of the tank. How far from the tank will the stream land
A projectile is fired at an upward angle of 45 degrees from the top of a 265 m cliff with a speed of 350 m/s. Illustrate what will be it's speed when it strikes the ground below?
A hypodermic syringe contains a medicinewith the density of water. The barrel of the syringe has across-sectional area of 2.50x10^-5 m^2. Determine the medicine flow speed through the needle
A 1250 kg car is moving at 18.7 m/s. Then, 203 kJ of work is done on the car to increase its speed. What will be the car's new speed
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