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Q. In a popular amusement park ride, a rotating cylinder of radius 4.00 m is set in rotation at an angular speed of 6.00 rad/s. The floor then drops away, leaving the riders suspended against the wall in a vertical position. What minimum coefficient of friction between a rider's clothing and the wall is needed to keep the rider from slipping? (Hint: Recall that the magnitude of the maximum force of static friction is equal to µn, where n is the normal force - in this case, the force causing the centripetal acceleration.)
A 5.20 g pop up toy is compressed 1.50 cm and pops up to the height of 50 cm the spring constant is 270 Nm. What is the loss of energy.
If a car moving at 82 takes 300 to stop with uniform acceleration after its brakes is applied, how far will it take to stop under the same conditions if its initial velocity is 41.
A 4.00-kg model rocket is launched, expelling 54.9 g of burned fuel from its exhaust at a speed of 690 m/s. What is the velocity of the rocket after fuel has burned.
What will be its length and height at rest
What is an angular speed about the center of mass
A steel ball of mass M is released from rest at point P. It follows a smooth curved rail to point Q and finally reaches point R with K.E. of 7J. The speed of the ball at point Q is 2MS-1 and the height between point P and the ground is 3m. Then find ..
Find out the vertical component of the reaction force
What is the kinetic energy of α particle while it reaches the other plate? The distance between the plates is 33 cm.
A 2.0 mL syringe has an inner diameter of 4.0 mm, the needle inner diameter of 0.21 mm, and a plunger pad diameter (where you place your finger) of 1.20 cm. A nurse uses the syringe to inject medicine into a patient whose blood pressure is 140/100. S..
Net horizontal force due to rolling friction
A 0.38 kg iron horseshoe that is initially at 580°C is dropped into a bucket containing 21.8kg of water at 21 °C. What is the final equilibrium temperature (in °C)? Avoid any heat transfer to or from the surroundings. Do not enter units.
Estimate the capacitance of the series combination of capacitors shown.
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