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A catapult launches a test rocket vertically upward from a well, giving the rocket an initial speed of81.0m/sat ground level. What is its velocity just before it hits the ground
An air-traffic controller observes two aircraft on his radar screen. The first is at altitude 750 m, What is the distance between the two aircraft
Two small beads having positive charges 2q and q are fixed at the opposite ends of a horizontal insulating rod, At what position is the third bead in equilibrium
An open organ pipe (i.e., a pipe open at both ends) of length Lo has a fundamental frequency Fo, what is the new fundamental frequency
Two farmers are standing on opposite sides of a very large empty field that is 520.6 m across. What is the temperature of the air
A guitar string with a mass of 10.0 g is 1.00 m long and attached to the guitar at two points separated by 61.6 cm. find the frequency of the replacement string's first harmonic
A rock is thrown vertically upward with a speed of 14.0 . Exactly 1.00 later, a ball is thrown up vertically along the same path with a speed of 21.0
The best leaper in the animal kingdom is the puma, With what speed must the animal leave the ground to reach that height
In this problem you will consider the balance of thermal energy radiated and absorbed by a person. Find the net power radiated by the person when in a room with temperature . Express the net radiated
an electron is shot directly toward the center of a large metal plate that has surface charge density -1.00 × 10-6 C/m2. how far from the plate must the launch point be
One afternoon, a couple walks three-fourths of the way around a circular lake, the radius of which is 1.61 km. What is the direction of the couples displacement
You have a ball on a wire that is twirled in a circular orbit with a radius of 3.8 m, and the centripetal force acting on the ball, What is the speed of the ball in orbit
Imagine a landing craft approaching the surface of Callisto, one of Jupiter's moons. What is the weight of the landing craft in the vicinity of Callisto's surface
A mass m2 = 1.8 kg, on a 39.4° incline, is connected to a mass m1 = 5.2 kg, on a horizontal surface. find the magnitude of the tension in the connecting cord
Two blocks (M1 = 2.75 kg and M2 = 6.49 kg) are in contact on a frictionless, horizontal tabletop. What is the contact force between the blocks
A block of mass 8.4 kg is pulled along a horizontal frictionless floor by a cord, What is the magnitude of the normal force exerted on the mass by the floor
A 130 kg crate is pushed at constant speed up the frictionless 28° ramp. What force is exerted by the ramp on the crate
Three blocks are located on a horizontal frictionless table. They are connected by a massless cord, What is the acceleration of the system
An elevator cabin has a mass of 350.5 kg, and the combined mass of the people inside the cabin is 183.7 kg. obtain the tension in the cable
During a long airport layover, a physicist father and his 8-year-old daughter try a game that involves a moving walkway. With what speed was the girl walking
The captain of a boat wants to travel directly across a river that flows due east with a speed of 1.42 m/s. What direction (in degrees) should the captain steer the boat
Your friend's car is parked on a cliff overlooking the ocean on an incline that makes an angle of 22.1° below the horizontal. Find the car's position relative to the base of the cliff
A football is punted with an initial velocity of 28.7 m/s and an initial angle of 54.1o. What is its hang time
You are practicing throwing darts in your dorm. You stand 3.33 m from the wall on which the board hangs. Calculate the time of flight of the dart
A sphere is charged with electrons to ?1 × 10^-5 C. How many electrons make up this charge