You are given two carts a and b. they look identical and you are told they are made of the same material. you place a at rest at an air track and give b a constant velocity directed to the right so that it collides elastically with a. after the collision cart b moves to the left. what do you conclude? a. cart a is hollow. b. the two carts are identical. c. cart b is hollow. prove your answer carefully!

2. two cylinders of the same size and mass roll down an incline. cylinder a is hollow, while cylinder b is solid. both cylinder are released from rest at the same time. which cylinder reaches the bottom of the incline first? a. cylinder a. b. both at the same time. c. cylinder b. prove your answer carefully!

Aria drove to the store, did some shopping, and then came home. during maria's trip, when was her displacement equal to zero?

1. the materials manager for a billiard ball maker must periodically place orders for resin, one of the raw materials used in producing billiard balls. she knows that manufacturing uses resin at a rate of 50 kilograms each day, and that it costs $.04 per day to carry a kilogram of resin in inventory. she also knows that the order costs for resin are $100 per order, and that the lead time for delivery is four (4) days.2. at what point should resin be reordered? a. 0 kilograms remainingb. 50 kilograms remainingc. 200 kilograms remainingd. 400 kilograms remaininge. 500 kilograms remaining3. if order size was 1,000 kilograms of resin, what would be the length of an order cycle? a. 0.05 daysb. 4 daysc. 16 daysd. 20 dayse. 50 days4. if the order size was 1,000 kilograms of resin, what would be the average inventory level? a. 50 kilogramsb. 200 kilogramsc. 500 kilogramsd. 800 kilogramse. 1,000 kilograms5. if the order size was 1,000 kilograms of resin, what would be the daily total inventory costs, excluding the cost of the resin? a. $5b. $10c. $20d. $25e. $40

Aturntable that spins at a constant 74.0 rpm takes 3.10 s to reach this angular speed after it is turned on. find its angular acceleration (in rad/s2), assuming it to be constant, and the number of degrees it turns through while speeding up.