A community for students.
Here's the question you clicked on:
 0 viewing
anonymous
 4 years ago
Sally applies a total force of 299 N with a
rope to drag a wooden crate of mass 100 kg
across a ﬂoor with a constant acceleration in
the xdirection of a = 0.1 m/s
2
. The rope tied
to the crate is pulled at an angle of θ = 59
◦
relative to the ﬂoor.
m
Calculate the total work done by friction as
the block moves a distance 21.8 m over the
horizontal surface. The acceleration due to
gravity is 9.8 m/s
2
.
Answer in units of J
anonymous
 4 years ago
Sally applies a total force of 299 N with a rope to drag a wooden crate of mass 100 kg across a ﬂoor with a constant acceleration in the xdirection of a = 0.1 m/s 2 . The rope tied to the crate is pulled at an angle of θ = 59 ◦ relative to the ﬂoor. m Calculate the total work done by friction as the block moves a distance 21.8 m over the horizontal surface. The acceleration due to gravity is 9.8 m/s 2 . Answer in units of J

This Question is Open

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0Do you need help to do it or want an answer? 3140J is what I get..

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0i would like how you got the answer too, apparently its really simple but i guess im just missing it

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0I have to go for lunch, back in 30mins or so if nobody else helps before then. is the answer right..?!

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0So, first thing is a free body diagram: dw:1352382563028:dw

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0Then given the acceleration, we work out the resultant force causing that acceleration: F = ma = 100 x 0.1 = 10N Now, we find the force of friction acting against the motion: 10N = Fcos59  F_friction, giving F_friction = 143.99N Now, the work done by this force is: Work = F_friction x distance = 143.99 x 21.8 = 3140J
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.