A 200 kg man rides in an elevator while standing on a scale. As the elevator rises with a constant acceleration of 6m/s2, what is the reading of the scale?  b) As the elevator lowers itself with a constant acceleration of 6m/s2, what is the reading of the scale?  c) As the elevator rises with a constant velocity of 2m/s, what is the reading of the scale?

Tom travels to the moon for NASA. While on the moon, the total weight of Tom and his lunar exploration suit is 224 N. His suit has a mass of 50 kg. The acceleration due to gravity is 9.81 m/s2 on Earth and 1.67 m/s2 on the moon. What would his weight be on Earth without the heavy suit?  1. 490 N  2. 830 N  3. 987 N  4. 1304 N

2. A mass of 2.50 kg is at rest at time = 0. Do not consider friction in this problem. Two vector forces are applied to the mass. What is the resulting vector acceleration? F1 = 2.40 i + 1.50 j Newtons. F2 = 5.00 Newtons at an angle of 25.0°with the positive X axis.

You place a crate of mass 40.9 kg on a frictionless 2.64-meter-long incline. You release the crate from rest, and it begins to slide down, eventually reaching the bottom 1.52 s after you released it. What is the angle of the incline?      17.6 degrees      13.5 degrees      21.6 degrees      25.9 degrees

You place a crate of mass 43.2 kg on a frictionless 4.99-meter-long incline. You release the crate from rest, and it begins to slide down, eventually reaching the bottom 1.99 s after you released it. What is the angle of the incline?     17.9 degrees     14.9 degrees     20.9 degrees     25.1 degrees

9. A 100 kg man gets in an elevator on the 10th floor. He stands still on a scale, which is placed on the floor of the elevator, before the doors close, and the scale reads a value equal to his weight (the largest force of gravity on him). The doors close, and the elevator starts moving downward toward the 1st floor. The elevator speeds up until it reaches the 8th floor, at which point the elevator travels at a constant velocity, which it maintains until it reaches the 3rd floor, at which point it starts slowing down at a constant rate and stops by the time it reaches the 1st floor. Rank from greatest to least, the following quantities at following floors: 2nd, 5th, 9th. Explain your answers. (a) His mass (the question is asking for a ranking of the person's mass on the 2nd floor vs. the mass on the 5th floor vs. the mass on the 9th floor.) (b) His weight (c) Magnitude of normal force he exerts on the scale (d) Magnitude of normal force he exerts on the elevator floor.

You place a crate of mass 20.3 kg on a frictionless 2.61-meter-long incline. You release the crate from rest, and it begins to slide down, eventually reaching the bottom 1.01 s after you released it. What is the angle of the incline?     37.7 degrees     31.4 degrees     44.0 degrees     57.2 degrees

You place a crate of mass 36.4 kg on a frictionless 3.71-meter-long incline. You release the crate from rest, and it begins to slide down, eventually reaching the bottom 1.56 s after you released it. What is the angle of the incline?     40.8 degrees     22.7 degrees     18.1 degrees     27.2 degrees

A car travels west at 30 miles an hour for 10 min West. The car then makes a u turn and travels east 45 miles per hour for fifteen min east. What is the cars total displacement? A- 10km W B-10 km E C- 26 km E D - 26 km W E- 6.2 km W

A box is travelling inside an elevator travelling at uniform acceleration and 5 m/s when the box falls out of the elevator. It takes 1.2 seconds to hit bottom of elevator shaft.  a) How long would it take before the elevator reached maximum height? b) How far did the box fall? c) How far did the box fall in 0.2 seconds?