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A 83-kg man stands on a spring scale in an elevator. Starting from rest, the elevator ascends, attaining its maximum speed of 1.2 m/s in 0.93 s. The elevator travels with this constant speed for 5.0 s, undergoes a uniform negative acceleration for 1.8 s, and then comes to rest. What does the spring scale register in each of the following time intervals?
1. before the elevator starts to move
2. through the elevator's negative acceleration.
3. through the first 0.93 s of the elevator's ascent.
4. while the elevator is traveling at constant speed.
A rotating wheel requires 6.00 s to rotate 30.0 revolutions. What is the constant angular acceleration (in rad/s) of the wheel
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Two electrons in an atom are separated by 1.3 × 10?10 m, the typical size of an atom. What is the force between them
To understand the vector nature of momentum in the case in which two objects collide and stick together. In this problem we will consider a collision of two moving objects such that after the collision, the objects stick together and travel off as..
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