Two blocks of mass mA=6.8kg and mg=9kg are attached to the ends of a massless string which passes through a pulley of radius R=35cm and mass M=7.3 kg. If the coefficient of the kinetic friction between the table and ma is uk=0.36 and mg was at an initial height of h=3.8m when the system was released from rest, determine the speed of mg right before it hits the ground.Express your answer using Sl units with one decimal place. Take g=9.8 m/s2 and assume that the pulley is in the shape of a disk with I=MR²/2. MA
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- (B) pleaseThe figure shows a thin rod, of length L = 2.20 m and negligible mass, that can pivot about one end to rotate in a vertical circle. A heavy ball of mass m = 9.70 kg is attached to the other end. The rod is pulled aside to angle θ0 = 5.4° and released with initial velocity v→0 = 0. (a) What is the speed of the ball at the lowest point? (b) Does the speed increase, decrease, or remain the same ifthe mass is increased?When a body of mass 0.25 kg is attached to a vertical massless spring, it is extended 5.0 cm from its unstretched length of 4.0 cm. The body and spring are placed on a horizontal frictionless surface and rotated about the held end of the spring at 2.0 rev/s. How far is the spring stretched?
- A massless spring of constant k = 88.2 N/m is fixed on the left side of a level track. A block of mass m = 0.50 kg is pressed against the spring and compresses it a distance of d, as in the figure shown below. The block (initially at rest) is then released and travels toward a circular loop-the-loop of radius R = 1.5 m. Given that the coefficient of kinetic friction between the block and the track along AB is ?k = 0.34, and that the length of AB is 2.5 m, determine the minimum compression d of the spring that enables the block to just make it through the loop-the-loop at point. Answer should be in meters.A spring with spring constant k and equilibrium length zero is attached tothe top of a frictionless hoop of radius R. The spring is stretched and connected to a bead of mass m at the bottom of the hoop. At t = 0 the bead is given an initial speed v0 and the bead moves up the hoop. Find the speed of the bead as a function of position on hoop v(θ).In the figure, a small block of mass m = 0.021 kg can slide along the frictionless loop-the-loop, with loop radius R = 13 cm. The block is released from rest at point P, at height h = 5R above the bottom of the loop. What are the magnitudes of (a) the horizontal component and (b) the vertical component of the net force acting on the block at point Q? (c) At what height h should the block be released from rest so that it is on the verge of losing contact with the track at the top of the loop? (On the verge of losing contact means that the normal force on the block from the track has just then become zero). P h 2T R Y
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