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A merry-go-round accelerates from rest to 0.71 in 21 . Assuming the merry-go-round is a uniform disk of radius 7.5 and mass 31500 , calculate the net torque required to accelerate it.
A proton is projected in the positive x direction into a region of uniform electric field E = -5.50 105 i N/C at t = 0. Determine the time interval over which the proton comes to rest
A 5.0-g mass if sandwiched between two springs with spring constant k1 aand k2. The mass is didplaced 10 cm from its equilibrium position and makes sixteen complete oscillations in 1 s with no loss of mechanical energy.
A helium-neon laser intended for instructional use operates 7.5 mW. Find out the maximum value of the electric field at a point where the cross sectional area of beam is 10 mm.
When the door is open and at rest, the door closer exerts a torque of 5.40 NxM. What is the least force that you need to be relevant to the door to hold it open.
A 62 g Frisbee is thrown from a point 1.3 m above the ground with a speed of 15 m/s. What was the reduction in the mechanical energy of the Frisbee-Earth system because of air drag
Apply Newton's second law to the elevator and find the maximum upward acceleration for the elevator if the cables are not to break? Please Help Guys
A jet is flying horizontally. when the plane is directly overhead at B, A person on the ground hears the sound coming from A. the average temperature of the air is 20 degrees celcius. if the speed of the plane at A is164 meters per second, what is..
An object with a charge of 0.880 µC is placed at the center of a regular icosahedron with 20 equivalent surfaces. What is the electric flux through one surface of the icosahedron?
A seed shoots out from the pod with the speed of 2.8 m/s but with a direction of motion 30° below the horizontal. What horizontal distance does it cover during its flight
A weather vane initially at rest has a moment of inertia of 0.103 kg · m2 about its axis of rotation, Find the angular velocity of the weather vane just after it is struck
An advertisement for a certain portable vacuum cleaner shows off its power with a photograph of the vacuum-cleaner wand suspending a bowling ball by the strength of its suction. find the weight of the heaviest ball the vacuum cleaner can lift
A dolphin wants to swim directly back to its home bay, which is 0.760 km due west. It can swim at a speed of 4.23 m/s relative to the water, but a uniform water current flows with speed 2.92 m/s in the southeast direction. What direction should th..
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