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A kid runs towards the edge of a merry-go-round that is not rotating and jumps on. The merry-go-round then rotates with a constant angular velocity ω. Assume that the kid has a mass of 40 kg and is initially running at a speed of 2 m/s tangent to the edge of the merry-go-round. The merry-go-round is a uniform disk with a mass of 100 kg and a radius of 2 m. Assume that it rotates without friction. What is the final angular velocity ωf (in radians/s) of the merry-go-round (with the kid riding)?
A charge q1 = -7 µC is at the origin, and feels a force along the positive x-axis equal to 1.8 N. What is the x-component of the electric field
Find the two locations where an object can be placed in front of a concave mirror with a radius of curvature of 37cm such that its twice its size
the top surface of the passenger car of a train moving at a velocity of 70 kmh is 2.8 m wide and 8 m long heat transfer
A green hoop with mass mh = 2.7 kg and radius Rh = 0.17 m hangs from a string that goes over a blue solid disk pulley with mass md = 2.3 kg and radius Rd = 0.09 m. The other end of the string is attached to a mass less axel through the center of an o..
an electron has an initial velocity with an x component of zero a y component of 10.4 kms a z component 13.4 kms and a
At time t = 0, a battery of 10 v is connected across points A and B in the given circuit. If the capacitors have no charge initially, at what time (in secs) does the voltage across them become 4 v?
A 5.59-kg ball hangs from the top of a vertical pole by a 2.19-m-long string. Calculate the angle, between 0° and 90° that the string makes with the pole. Take g = 9.81 m/s2
A farsighted person has a near point of 50-cm from her eyes. She wants glasses that would let her see objects at a distance of only 25.00 cm from her eyes. Determine out the focal length of the glasses needed if the glasses are 2 cm and 3 cm from ..
Two resistors are connected in series to a battery with an emf of 12 V. The voltage across the first resistor is 2.9V, Find the resistance of the second resistor
an electron in an oscilloscope tube is traveling horizontally with a speed of 4.4times106 ms . it passes through a
A huge space cruiser passes earth at speed c/2. It launches a small fighter ship away from earth (thank goodness) at speed c/2 relative to the cruiser. What is the speed of the fighter ship relative to earth
On an airplane's takeoff, the combined action of the air around the engines and wings of an airplane exerts a 8360 N force on the plane, directed upward at an angle of 56.0° above the horizontal.
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