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l. The sun's radius is 6.96 x 105 m and it rotates with a period of 25.3 days. Estimate its new period of rotation if it were to collapse with no loss of mass to become a neutron star of radius 5.00 km. 2. A meter stick is held vertically With one end on the oor and is then allowed to fall. Find the speed of the other end just before it hits the oor, assuming that the end on the oor does not slip. (Hint: Consider the stick to be a thin rod and use the conservation of energy principle.) 3. In the gure, block 1 has mass m = 460 g, block 2 has mass m2 = 500 g, and the pulley, which is mounted on a horizontal axle with negligible friction, has radius R = 5.00 cm. When released from rest, block 2 falls 75.0 cm in 5.00 s without the cord slipping on the pulley. (a) What is the magnitude of the acceleration of the blocks? What are (b) tension T 2 and (c) tension T1? ((1) What is the magnitude of the pulley's angular acceleration? (e) What is its rotational inertia? 4. A uniform solid ball rolls smoothly along a oor, then up a ramp inclined at 150. It momentarily stops when it has rolled 1.50 m along the ramp. What was its initial speed