Sof15 47 1;: View Policies Current Attempt in Progress The gure shows two blocks connected by a cord (of negligible mass) that passes over a frictionless pulley (also of negligible mass). The arrangement is known as Atwood's machine. Block 1 has mass m1 = 2.1 kg; block 2 has mass m2 = 4.1 kg. What are (a) the magnitude of the blocks' acceleration and (b) the tension in the cord? (a) Number Units v (b) Number Units v 60f15 4... xi a... I\" III View Policies Current Attempt in Progress A block of mass m1 = 3.14 kg on a frictionless plane inclined at angle 6 = 30.1\" is connected by a cord over a massless, frictionless pulley to a second block of mass m2 = 2.65 kg hanging vertically (see the gure). (a) What is the acceleration of the hanging block (choose the positive direction down}? (b) What is the tension in the cord? (a) Number n Units v (b) Number I Units v 4.. 0'1 HM II III 130f15 View Policies Current Attempt in Progress In the gure, block A (mass 1.7 kg} slides into block B (mass 2.0 kg), along a frictionless surface. The directions of velocities before and after the collision are indicated; the corresponding speeds are vA; = 5.4 m/s. v3,- = 2.6 m/s, and var = 4.5 m/s. What is velocity vAf (including sign, where positive denotes motion to the right)? Number n Units v 120f15 -/6 a: View Policies Current Attempt in Progress In the gure, block 2 (mass 1.00 kg) is at rest on a frictionless surface and touching the end of an unstretched spring of spring constant 113 N/m. The other end of the spring is xed to a wall. Block 1 (mass 1.10 kg), traveling at speed v1 = 5.80 m/s. collides with block 2. and the two blocks stick together. When the blocks momentarily stop. by what distance is the spring compressed? Number l Units v 2 of 15 - 17 E View Policies Current Attempt in Progress In the figure, a crate of mass m = 123 kg is pushed at a constant speed up a frictionless ramp (0 = 29) by a horizontal force F . The positive direction of an x axis is up the ramp, and the positive direction of a y axis is perpendicular to the ramp. (a) What is the magnitude of F ? (b) What is the magnitude of the normal force on the crate? (a) Number i Units V (b) Number i Units V