The figure represents a small, flat puck with mass m= 2.44 kg sliding on a frictionless,...

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The figure represents a small, flat puck with mass m= 2.44 kg sliding on a frictionless, horizontal surface. It is held in a circular orbit about a fixed axis by a rod with negligible mass and length R= 1.43 m, pivoted at one end. Initially, the puck has a speed of v=4.78 m/s. A 1.20 kg ball of putty is dropped vertically onto the center of the puck from a small distance above it and immediately sticks to the puck. (a) What is the new period of rotation? (b) Is angular momentum of the puck-putty system about the axis of rotation conserved in this process? O Angular momentum of the puck-putty system is conserved. O Angular momentum of the puck-putty system in NOT conserved. O The pivot exerts a definite torque. O The pivot exerts NO torque. X (c) Is momentum of the system conserved in the short process of the putty sticking to the puck? O System momentum is conserved. O System momentum is NOT conserved, (d) Which statements are true regarding the conservation of mechanical energy of the system in the process? O Some mechanical energy is converted into internal energy. O The collision is perfectly elastic. O The collision is perfectly inelastic. O The mechanical energy is conserved. 4 The figure represents a small, flat puck with mass m= 2.44 kg sliding on a frictionless, horizontal surface. It is held in a circular orbit about a fixed axis by a rod with negligible mass and length R= 1.43 m, pivoted at one end. Initially, the puck has a speed of v=4.78 m/s. A 1.20 kg ball of putty is dropped vertically onto the center of the puck from a small distance above it and immediately sticks to the puck. (a) What is the new period of rotation? (b) Is angular momentum of the puck-putty system about the axis of rotation conserved in this process? O Angular momentum of the puck-putty system is conserved. O Angular momentum of the puck-putty system in NOT conserved. O The pivot exerts a definite torque. O The pivot exerts NO torque. X (c) Is momentum of the system conserved in the short process of the putty sticking to the puck? O System momentum is conserved. O System momentum is NOT conserved, (d) Which statements are true regarding the conservation of mechanical energy of the system in the process? O Some mechanical energy is converted into internal energy. O The collision is perfectly elastic. O The collision is perfectly inelastic. O The mechanical energy is conserved. 4

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