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Two pole-vaulters just clear the bar at the same height. The first lands at a speed of 7.84 m/s, while the second lands at a speed of 8.32 m/s. The first vaulter clears the bar at a speed of 0.800 m/s. Ignore air resistance and friction and determine the speed at which the second vaulter clears the bar.
A 5 kgblock is placed near the top of a frictionless ramp, which makes an angle of30odegrees to the horizontal. Find the magnitude of the maximum compression of the spring
A jet aicraft is traveling at 22m/s in horizontal flight.The engine takes in air at a rate of 72.0 kg/s and burns fuel at a rate of 2.70 kg/s. Find the thrust of the jet engine
An object with a mass of 1.60kg is at rest on a horizontal, frictionless surface of a rink. What are the positions and speed of the object st the end of that time
The sun is 150,000,000 km away. The mass of the sun is 2x1030 kg, the mass of the earth is 6x1024 kg. What is the torque of the earth on the sun
A proton moves eastward in the plane of Earth's 5x10^-5 T magnetic equator so that its distance from the ground is constant
On aircraft carriers, catapults are used to accelerate jet aircraft to flight speeds in a short distance. How far does the jet travel while it is accelerating
Two people carry a heavy electric motor by placing it on a light board 2.05m long. One person lifts at one end with a force of 405N , What is the weight of the motor
Under standard conditions, the density of air is 1.293 kg/m3 and that of helium is 0.178 kg/m3, What must be the minimum diameter of the spherical balloon
A solid disk of mass m1 = 9.1 kg and radius R = 0.25 m is rotating with a constant angular velocity of ? = 33.0 rad/s. What average torque was exerted on the rod by the disk
A positively charged oil drop of mass 1.0 × 10-15 kg is placed in the region of a uniform electric field between two oppositely charged, What is the magnitude of the charge on the drop
A baseball leaves the batter's bat at 30 degrees above horizontal. with what speed does the ball leave the bat
A 3.0 m tall, 54 cm diameter concrete column supports a 190,000 kg load. By how much is the column compressed
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