a1.5 kg ball rises upward 2.0 m above the ground when it is thrown straight up. Use the ground as your reference point (y = 0) for gravitational potential energy. The potential energy of the ball at ground level is closest to: 0.0 J 3.0 J 9.8 J 19.6 J 29.4 J The potential energy of the ball at its highest point is closest to: 0.0 J 3.0 J 9.8 J 19.6 J 29.4 J The kinetic energy of the ball at ground level is closest to: 0.0 J 3.0 J 9.8 J 19.6 J 29.4 J The kinetic energy of the ball at its highest point is closest to: 0.0 J 3.0 J 9.8 J 19.6 J 29.4 J The speed of the ball at ground level, just after the throw, is closest to: 3.6 m/s 3.0 J 6.3 m/s 8.9 m/s A railroad car has a mass of 8000 kg and is moving with a speed of 2.0 m/s on straight level tracks. It collides with a 15,000 kg stationary car, and the two cars couple to each other and move together. The speed of the cars after the collision is closest to 0.436 m/s 0.696 m/s 1.07 m/s 2.14 m/s 3.75 m/s The total kinetic energy of the cars before the collision is closest to: 5600 J 8400 J 12000 J 10800 J 16000 J The total energy of the cars after the collision is closest to: 56000 J 8400 J 10800 J 12000 J e. 16000 J A bead moves along a frictionless circular track of radius 2.0 m as shown. The speed of the bead at the lowest point A of the track is 3.0 m/s. The maximum height (at B) attained by the bead is how far above the lowest point (at A)? 0.46 m 0.47 m. 0.48 m 0.49 m 0.50 m The center of the circular track is at C. The angle ACB is closest to: 0.77 degree 17 degree 25 degree 40 degree 45 degree
