A community for students.
Here's the question you clicked on:
 0 viewing
NotTim
 2 years ago
Determine the magnitude of the apparent weight of a 56 kg student standing in an elevator when the elevator is experiencing an acceleration of (a) 3.2 m/s^2 downward and (b) 3.2 m/s^2 upward.
NotTim
 2 years ago
Determine the magnitude of the apparent weight of a 56 kg student standing in an elevator when the elevator is experiencing an acceleration of (a) 3.2 m/s^2 downward and (b) 3.2 m/s^2 upward.

This Question is Closed

bahrom7893
 2 years ago
Best ResponseYou've already chosen the best response.1W = m*a When it's going up, acceleration is: g+a, when it's going down acceleration is ga

bahrom7893
 2 years ago
Best ResponseYou've already chosen the best response.1a) total a = 9.83.2 = 13 W = 56*(13)N

NotTim
 2 years ago
Best ResponseYou've already chosen the best response.1You see, here's what I did for a and b.

bahrom7893
 2 years ago
Best ResponseYou've already chosen the best response.1b) total a = 9.8 + 3.2 = 6.6 W = 56*(6.6)N

NotTim
 2 years ago
Best ResponseYou've already chosen the best response.1a) f=ma =(56)(3.2+9.81) =728.56N

NotTim
 2 years ago
Best ResponseYou've already chosen the best response.1Why is the force negative in both cases?

bahrom7893
 2 years ago
Best ResponseYou've already chosen the best response.1because weight is pushing down.

NotTim
 2 years ago
Best ResponseYou've already chosen the best response.1Ok. Give me a second to redo this...

bahrom7893
 2 years ago
Best ResponseYou've already chosen the best response.1same thing, just change the signs

bahrom7893
 2 years ago
Best ResponseYou've already chosen the best response.1you found the normal force, which has the same magnitude, but opposite direction

NotTim
 2 years ago
Best ResponseYou've already chosen the best response.1And its alright if my signs are negative? Because the answers are A) 3.7*10^2N and b) 7.3*10^2N

bahrom7893
 2 years ago
Best ResponseYou've already chosen the best response.1ohh yea they asked for magnitude. If they just asked for weight, ur answers wld be negative

bahrom7893
 2 years ago
Best ResponseYou've already chosen the best response.1since weight has magnitude and direction. In this case it's going down, hence the negative.

NotTim
 2 years ago
Best ResponseYou've already chosen the best response.1k. ill work with this. if i need help, ill call out

NotTim
 2 years ago
Best ResponseYou've already chosen the best response.1the answer for A) was wrong. you probably explained this, but i forgot

NotTim
 2 years ago
Best ResponseYou've already chosen the best response.1We got 728.56N. The book says 3.7*10^2N

bahrom7893
 2 years ago
Best ResponseYou've already chosen the best response.1Wait in the answer, is the answer for a greater than the answer for b?

bahrom7893
 2 years ago
Best ResponseYou've already chosen the best response.1A) 3.7*10^2N and b) 7.3*10^2N Aren't those the answers?

bahrom7893
 2 years ago
Best ResponseYou've already chosen the best response.1oh yea.. obv. Hang on I know what we did wrong

NotTim
 2 years ago
Best ResponseYou've already chosen the best response.1for A), i did this: "56)(3.29.81)

bahrom7893
 2 years ago
Best ResponseYou've already chosen the best response.1well it makes sense.. i just always confuse the signs of g. g has to be positive in this case.

NotTim
 2 years ago
Best ResponseYou've already chosen the best response.1would that make my value of 3.2N positive too?

bahrom7893
 2 years ago
Best ResponseYou've already chosen the best response.1it's the sign of g, i always get confused with it..

NotTim
 2 years ago
Best ResponseYou've already chosen the best response.1am I to consider 3.2N a positive or negative force?

bahrom7893
 2 years ago
Best ResponseYou've already chosen the best response.1well is it pushing down or up?

NotTim
 2 years ago
Best ResponseYou've already chosen the best response.1If it was ve, it would make sense mathematically, but not in terms of real world physics(for me)

bahrom7893
 2 years ago
Best ResponseYou've already chosen the best response.1then it's negative, but they're just asking for magnitude, or abs value of that force.

NotTim
 2 years ago
Best ResponseYou've already chosen the best response.1ok. give me a moment to readi guess
Ask your own question
Sign UpFind more explanations on OpenStudy
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.