A community for students.
Here's the question you clicked on:
 0 viewing
anonymous
 4 years ago
A wet bar of soap (m= 0.150 kg) slides down a ramp 2.0m long at an angle of 7.3 degrees. How long does it take to reach the bottom?
anonymous
 4 years ago
A wet bar of soap (m= 0.150 kg) slides down a ramp 2.0m long at an angle of 7.3 degrees. How long does it take to reach the bottom?

This Question is Closed

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0Since it is a wet bar of soap, I assume there is no friction. If we draw the forces diagram, we found that there is a resultant force of the normal reaction N and the gravitational force F=mg and that F=mgsin(alpha). That force is equal to F=ma, therefore mgsin(alpha)=ma=>a=gsin(alpha). From the equation t=sqrt(2x/a), we get that t is approximately 1,8 seconds. Keep in mind that this is actually independent of the mass of the body.

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0ohhhh i did F=mgcos. could you explain why it's sin? also thanks

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0no the answer is infact 1.8 ...

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0Oh yeah.. Now i forgot taking the square root LOL... 1,8 seconds is infact the right answer. I hope that this sketch helps you :P

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0ohhh i see, i calculated a y component for gravity as well which doesn't really exist in this case. well anyway, thanks! :)
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.