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- 1. A block of mass m is pushed against (but not attached to) a spring with stiffness k so that the spring is compressed a distance Ar. When released, the block slides across the frictionless surface of a shelf a height h above the floor, the then falls to the floor. a. What is the speed of the block at the moment it leaves the shelf? V2 = b. What is the speed of the block at the moment just before it hits the ground? Vr =Q24. As shown in the image below, the 16-kg block A and the 42-kg block B connected by the weightless, frictionless pulley system are released from rest. Determine the speed of block B when block A has displaced downwards by 0.7 m. Please pay attention: the numbers may change since they are randomized. Your answer must include 3 places after the decimal point, and proper Sl unit. A Answer: d O [o k BA world-class sprinter running a 100 m dash was clocked at 5.4 m/s 1.0 s after starting running and at 9.8 m/s 1.5 s later. Part A Determine the ratio of his output powers in these time intervals. Po to 1 P1 to 2.5 15 ΑΣΦ ?
- 2.2. Two objects, A and B are treated as a single system. The table to the right shows some of the properties of each object at time t = 0.0 s. Use the information in the table to calculate А B color green orange 120 kg 85 kg mass -35 m the following at time t = 0.0 s: position 25 m (a) the total mass of the system (b) the total kinetic energy of the system (c) the total momentum of the system -15 m/s velocity 15 m/s temperature 15°C 25 °C (d) the position and the velocity of the cen- ter of mass of the system段階的に解決し、 人工知能を使用せず、 優れた仕事を行います ご支援ありがとうございました SOLVE STEP BY STEP IN DIGITAL FORMAT DON'T USE AI | DON'T USE AI | DON'T USE AI | DON'T USE AI | A car of mass 1600 kg starts from rest on a level road and reaches a speed of 80 km/h in 33 s. a) What is the kinetic energy of the car at the end of 33 s? b) What is the average net power developed by the car during the 33 s interval? c) What is the instantaneous power at the end of the 33 s interval assuming that the acceleration was constant?