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An ant travels in a perfectly straight line in the –x direction some distance. It turns, and then travels some new displacement, 30.0O above the +x axis, again, in a straight line, for some distance. The final leg of its little ant journey is a displacement of 15 cm, 40.0O below the +x axis, and its back at its starting point. What are the magnitudes of the first two displacements?
You have a grindstone ( a disk) that is 80.0 kg, has a .349-m radius, and is turning at 104.0 rpm, Calculate the angular acceleration of the grindstone
copper has 8.5 x 10^28 electrons per cubic meter. a 12-gauge copper wire is 25.0cm in length and 2.05mm in diameter. what is the average drift speed of the electrons along the wire
two boxes a and b are connected by a lightweight cord disregard the mass of the cord. box a has a mass of 5.0 kg and
How much work does the electric field do in moving a -7.7 microCoulomb charge from ground to a point whose potential is +positive 55V higher.
A solenoid is wound with 470 turns on a form 4 cm in diameter and 50 cm long. What is the current in the solenoid windings
A woman throws a ball at a vertical wall d = 3.0 m away. The ball is h = 1.5 m above ground when it leaves the woman's hand with an initial velocity of 12 m/s at 45°.
A.A car approaches a level, circular curve by the radius of 45.0 m. The coefficient of static friction is 1.20, and the coefficient of kinetic friction is 0.85, among the tire and the road. What is the maximum speed at which the car can negotiate the..
A student throws a 100g snowball at 7.5m/s at the side of the schoolhouse, where it hits and sticks. What is the magnitude of the average force on the wall
A 1.40-kg block slides with a speed of 0.950 m/s on a frictionless horizontal surface until it encounters a spring with a force constant of 734 N/m. The block comes to rest after compressing the spring 4.15 cm.
An object is dropped from rest from a height of 3.74E+6 m above the surface of the earth. If there is no air resistance, what is its speed when it strikes the earth
You have a 200 kg cylinder of ice. It is bobbing vertically in the water. Ice's density is 900 kg per cubic meter. What is the density of 'Rebellium'
an airplane starts from rest and accelerates at a constant 3.00 m/s^2 for 30.0 s before leaving the ground. how fast was the airplane going when it took off
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