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A football is kicked straight up into the air; it hits the ground 3.8s s later.
A. What was the greatest height reached by the ball? Assume it is kicked from ground level. (two sig figures)
B. With what speed did it leave the kicker's foot? (two sig figures)
A train siren indicating that the stationary train is ready to leave the station has a frequency of 80 Hz. What frequency is perceived by the occupant of a car traveling away from the train at 30 m/s? The speed of sound in air is 343 m/s.
An Olympic skier moving at 20m/s down a 30o slope encounters a region of wet snow and slides 145 m before coming to a stop. What is the coefficient of friction between skis and snow if the combined mass of the skier and skis is 55 Kgm.
An object has a kinetic energy of 257J and a momentum of magnitude 21.8 kg·m/s. Find out the speed and the mass of the object.
A ranger in a national park is driving at 24.0 mi/h when a deer jumps into the road 270 ft ahead of the vehicle. After a reaction time of t, ranger applies the brakes to produce an acceleration of a = -9.00 ft/s2. What is the greatest reaction tim..
You hold a spherical salad bowl 90 in front of your face with the bottom of the bowl facing you. The salad bowl is made of polished metal with the 30 radius of curvature. Where is the image of your 2.0 tall noses located.
The rocket fires for 10 mins , after that the asteroid is moving at 30 degrees to its original path at the speed of 18 km/h/ Find its average acceleration.
If a woman lifts a 20.0 kg bucket from a well and does 6.00 kJ of work, how deep is the well? Suppose that the speed of the bucket remains constant as it is lifted.
What is the value of h0? If the block were released from height 3h0 above the spring, Evaluate the maximum compression of the spring?
A spherical rain drop carries a charge of 2.70E-8 C and has a potential of 5.76E+4 V at the surface, Find the surface area of the drop
A parachutist descending at a speed of 10.0 m/s loses a shoe at an altitude of 30.0 m. (Assume the positive direction is upward.). Explain when does the shoe reach the ground? What is the velocity of the shoe just before it hits the ground?
imagine that each person is about the same distance from the center of the field and can generate the same level of sound intensity. How many people are at game.
Find the shear strain that results if a force of magnitude 8×10^5 is applied to the top square face of the plate, parallel to the side, and a force of equal magnitude is applied in the opposite direction to bottom face of the plate.
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