Elevator Problems 1. A 15-kg dog steps onto an elevator at the ground floor of an office building. Calculate what the scale will read (the apparent weight of the dog) in the following circumstances. (a) The elevator is at rest. (b) The elevator is going up and speeding up with an acceleration of magnitude 3 m/s2. (c) The elevator is going up at a constant velocity of magnitude 5 m/s. (d) The elevator is going up and slowing down with an acceleration of magnitude 3 m/s2. (e) The elevator is going down and speeding up with an acceleration of magnitude 3 m/s2. (f) The elevator is going down at a constant velocity of magnitude 5 m/s. (g) The elevator is going down and slowing down with an acceleration of magnitude 3 m/s2. 2. A 35-kg ostrich is in an elevator and standing on a scale. Calculate the acceleration of the elevator when the scale reads the following values. (a) 395.5 Newtons. (b) 343 Newtons. (c) 290.5 Newtons. (d) In part a, is the elevator speeding up, slowing down, or is it impossible to tell? (e) How is the elevator moving in part b, or is it impossible to tell? (f) In part c, is the elevator speeding up, slowing down, or is it impossible to tell? 3. A 25-kg chupacabra steps onto an elevator at the top floor of an office building. Calculate what the scale will read (the apparent weight of the chupacabra) in the following circumstances. (a) The elevator is at rest. (b) The elevator is going down and speeding up with an acceleration of magnitude 4.5 m/s2. (c) The elevator is going down at a constant velocity of magnitude 8 m/s. (d) The elevator is going down and slowing down with an acceleration of magnitude 4.5 m/s2. (e) The elevator is going up and speeding up with an acceleration of magnitude 4.5 m/s2. (f) The elevator is going up at a constant velocity of magnitude 8 m/s. (g) The elevator is going up and slowing down with an acceleration of magnitude 4.5 m/s2. 4. A 60-kg alligator is in an elevator and standing on a scale. Calculate the acceleration of the elevator when the scale reads the following values. (a) 888 Newtons. (b) 588 Newtons. (c) 288 Newtons. (d) In part a, is the elevator speeding up, slowing down, or is it impossible to tell? (e) How is the elevator moving in part b, or is it impossible to tell? (f) In part c, is the elevator speeding up, slowing down, or is it impossible to tell?

Elevator Problems 1. A 15-kg dog steps onto an elevator at the ground floor of an office building. Calculate what the scale will read (the apparent weight of the dog) in the following circumstances. (a) The elevator is at rest. (b) The elevator is going up and speeding up with an acceleration of magnitude 3 m/s2. (c) The elevator is going up at a constant velocity of magnitude 5 m/s. (d) The elevator is going up and slowing down with an acceleration of magnitude 3 m/s2. (e) The elevator is going down and speeding up with an acceleration of magnitude 3 m/s2. (f) The elevator is going down at a constant velocity of magnitude 5 m/s. (g) The elevator is going down and slowing down with an acceleration of magnitude 3 m/s2. 2. A 35-kg ostrich is in an elevator and standing on a scale. Calculate the acceleration of the elevator when the scale reads the following values. (a) 395.5 Newtons. (b) 343 Newtons. (c) 290.5 Newtons. (d) In part a, is the elevator speeding up, slowing down, or is it impossible to tell? (e) How is the elevator moving in part b, or is it impossible to tell? (f) In part c, is the elevator speeding up, slowing down, or is it impossible to tell? 3. A 25-kg chupacabra steps onto an elevator at the top floor of an office building. Calculate what the scale will read (the apparent weight of the chupacabra) in the following circumstances. (a) The elevator is at rest. (b) The elevator is going down and speeding up with an acceleration of magnitude 4.5 m/s2. (c) The elevator is going down at a constant velocity of magnitude 8 m/s. (d) The elevator is going down and slowing down with an acceleration of magnitude 4.5 m/s2. (e) The elevator is going up and speeding up with an acceleration of magnitude 4.5 m/s2. (f) The elevator is going up at a constant velocity of magnitude 8 m/s. (g) The elevator is going up and slowing down with an acceleration of magnitude 4.5 m/s2. 4. A 60-kg alligator is in an elevator and standing on a scale. Calculate the acceleration of the elevator when the scale reads the following values. (a) 888 Newtons. (b) 588 Newtons. (c) 288 Newtons. (d) In part a, is the elevator speeding up, slowing down, or is it impossible to tell? (e) How is the elevator moving in part b, or is it impossible to tell? (f) In part c, is the elevator speeding up, slowing down, or is it impossible to tell?