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> Problem 4.23 Cart A, of inertia 1.1 kg, is initially at rest on a low-friction track; cart B, of unknown inertia, has an initial velocity of +3.4 m/s in your coordinate system. After the two carts collide, the final velocities are +20 m/s and 83.0 m/s. ▼ Part A What is the inertia of cart B?- Express your answer with the appropriate units. TRB # Submit μÅ 4 → Value Units Previous Answers Request Answer ? X Incorrect; Try Again; 5 attempts remaining i
Problem 4.72 You point a tennis-ball serving machine straight up and put a piece of plastic wrap across the top of the barrel, placing a 10-g marble on top of the barrel. When a 58-g tennis ball in the machine is fired, it sends the marble into the air. The marble rises 210 m above the barrel mouth, and the tennis ball rises 71 m. Part A Neglecting the plastic wrap, what is the ball's launch speed? Express your answer to two significant digits and include the appropriate units. HÅ 4 UW Value Submit Remunst Answer Units ?
Problem 4.56 A20-kg cart and a 3.0-kg cart collide on a low-triction track. The 3.0-kg cart is initially moving at 3.0 m/s to the right, but after the collision it is moving at 6.5 m/s to the right. After the collision, the 2.0-kg cart is moving to the right at 4.0 m/s. Part A If the direction from left to right is positive, what was the 20-kg carts initial velocity? Express your answer with the appropriate units. Submit Part B Value EM Resvest Answer What would your answer be if, other quantties being unchanged the 30-kg cart were initially moving to the lat 3.0 m/s Express your answer with the appropriate units. PA Units Value ? Units 9 of 10 Bere