2a. Joy is standing on a bathroom scale in an elevator. Yes, people are staring at her. Her mass is 50 kg. What does the scale read when the elevator is at rest? Include the unit. 2b. What does the scale read when the elevator accelerates upward from rest at 2m/s2? 2c. What does the scale read when the elevator moves up with a constant velocity of 10m/s? 3a. Many people are familiar with the fact that a rifle recoils when fired. A gunpowder explosion creates hot gases that expand outward allowing the rifle to push forward on the bullet. Compare the force on the rifle with the force on the bullet in terms of force direction and magnitude. This is a conceptual question. No calculation is needed. 3b. Compare the acceleration on the rifle with the acceleration on the bullet in terms of mass and force. This is a conceptual question. No calculation is needed.
Formulas:
Fnet=ma
Fg=mg
Ff=μmg
d=d0 + v0t + 1/2 at2
a=(v-v0)/t
v2=v02 + 2a(d-d0)
g=9.80m/s2
Thank you for helping me with my homework. It is due in one hour, so I hope somebody can help me soon. Also, it is a long question so I don't mind if you subtract multiple questions out of my account. Thank you so much.
2a. Joy is standing on a bathroom scale in an elevator. Yes, people are staring at her. Her mass is 50 kg. What does the scale read when the elevator is at rest? Include the unit.
2b. What does the scale read when the elevator accelerates upward from rest at 2m/s2?
2c. What does the scale read when the elevator moves up with a constant velocity of 10m/s?
3a. Many people are familiar with the fact that a rifle recoils when fired. A gunpowder explosion creates hot gases that expand outward allowing the rifle to push forward on the bullet. Compare the force on the rifle with the force on the bullet in terms of force direction and magnitude. This is a conceptual question. No calculation is needed.
3b. Compare the acceleration on the rifle with the acceleration on the bullet in terms of mass and force. This is a conceptual question. No calculation is needed.
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