14. [-/10 Points] DETAILS SERPSE10 9.6.P.024. MY NOTES ASK YOUR TEACHER A uniform piece of sheet metal is shaped as shown in the figure below. Compute the x and y coordinates of the center of mass of the piece. X cm cm y (cm) 30 20 10 10 20 30 x (cm) Need Help? Read it Watch It 15. [-/10 Points] DETAILS SERPSE10 9.6.P.026. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A rod of length 38.50 cm has linear density (mass per length) given by 1 = 50.0 + 17.0x where x is the distance from one end, and 1 is measured in grams/meter. (a) What is its mass? 9 (b) How far from the x = 0 end is its center of mass? m Need Help? Read It 16. [-/10 Points] DETAILS SERPSE10 9.7.OP.027. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A 1.96-kg particle has a velocity (1.94 i - 2.90 j) m/s, and a 3.04-kg particle has a velocity (1.05 i + 5.96 j) m/s. (a) Find the velocity of the center of mass. Ji+C i) m/s (b) Find the total momentum of the system. i+ j kg . m/s Need Help? Read It Watch It 17. [-/10 Points] DETAILS SERPSE10 9.7.OP.028.MI.SA. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER This question has several parts that must be completed sequentially. If you skip a part of the question, you will not receive any points for the skipped part, and you will not be able to come back to the skipped part. Tutorial Exercise Romeo (78.0 kg) entertains Juliet (46.0 kg) by playing his guitar from the rear of their boat at rest in still water, 2.70 m away from Juliet, who is in the front of the boat. After the serenade, Juliet carefully moves to the rear of the boat (away from shore) to plant a kiss on Romeo's cheek. How far does the 84.0-kg boat move toward the shore it is facing? Click here to begin! Need Help? Read It18. [-/10 Points] DETAILS SERPSE10 9.A.OP.035.MI.SA. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER This question has several parts that must be completed sequentially. If you skip a part of the question, you will not receive any points for the skipped part, and you will not be able to come back to the skipped part. Tutorial Exercise A 4.60-kg steel ball strikes a wall with a speed of 12.0 m/s at an angle of 0 = 60.0 with the surface. It bounces off with the same speed and angle (see figure below). If the ball is in contact with the wall for 0.200 s, what is the average force exerted by the wall on the ball? (Assume right is the positive direction.) Click here to begin! Need Help? Read It 19. [-/10 Points] DETAILS SERPSE10 9.A.OP.044.MI.SA. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER This question has several parts that must be completed sequentially. If you skip a part of the question, you will not receive any points for the skipped part, and you will not be able to come back to the skipped part. Tutorial Exercise A 5.00-g bullet moving with an initial speed of v, = 465 m/s is fired into and passes through a 1.00-kg block as shown in the figure below. The block, initially at rest on a frictionless, horizontal surface, is connected to a spring with force constant 935 N/m. The block moves d = 5.30 cm to the right after impact before being brought to rest by the spring. vi (a) Find the speed at which the bullet emerges from the block. (b) Find the amount of initial kinetic energy of the bullet that is converted into internal energy in bullet-block system during the collision. Click here to begin! Need Help? Read It