1) 2) 3) 4) 5) 6) 7) 8) 9) A nut comes loose from a bolt on the bottom of an elevator as the elevator is moving up the shaft at 3.00 m/s. The nut strikes the bottom of the shaft in 2.00s. (a) How far from the bottom of the shaft was the elevator when the nut fell off? (b) How far above the bottom was the nut 0.25 s after it fell off? A plane starts from rest and accelerates along the ground before take-off. It moves 600.0 m in 12 s. Find (a) the acceleration, (b) speed at the end of 12 s, (c) distance moved during the twelfth second. A baseball is thrown straight upward with a speed of 30.0 m/s. (a) How long will it rise? (b} How high will it rise? (c) How long after it leaves the hand will it return to the starting point? (d) When will its speed be 16.0 m/s? A car goes 5.0 km [E], 3.0 km [S], 2.0 km [W] and 1.0 km [N]. (a) Determine how far North and how far East it has been displaced. (b) Find the displacement vector algebraically (no scale diagrams). Two forces act on a point object as follows: 100.0 N [S10E] and 100.0 N [E40N]. Find their resultant. A ship is travelling due east at 10.0 km/h. What must be the speed of a second ship heading 30.0 east of north, if it is always due north of the first ship? A 20.0 kg crate hangs at the end of a long rope. Find its acceleration when the tension in the rope is (a) 250.0 N, (b} 150.0 N, (c) zero, (d) 196.2 N A 5.00 kg mass hangs on the end of a cord. Find the tension in the cord if the acceleration of the mass is (a) 1.50 m/s? [up], (b) 1.50 m/s? [down], (c) 9.81 m/s? [down] A 700.0 N man stands on a scale in an elevator. The scale records the force it exerts on whatever is on it. What is the scale reading if the elevator acceleration is (a) 1.80 m/s? [up], (b) 1.80 m/s? [down], (c) 9.81 m/s? [down] 10) A 20.0 kg wagon is pulled along the level ground by a rope inclined at 30.0 above the horizontal. A friction force of 30.0 N opposes the motion. What is the magnitude of the pulling force if the wagon is moving with (a) constant speed, (b) an acceleration of 0.400 m/s?? 11) At sea level, a nitrogen molecule in the air has an average translational kinetic energy of 6.20 x 1021]. Its mass is 4.70 x 10% kg. (a) If the molecule could shoot straight up without striking other air molecules, how high would it rise? (b) What was the molecule's initial speed? 12) A 1200.0 kg car coasts from rest down a driveway that is inclined 20.0 to the horizontal and is 15.0 m long. How fast is the car going at the end of the driveway if (a) friction is negligible, (b) a friction force of 3000.0 N opposes the motion