A community for students.
Here's the question you clicked on:
 0 viewing
anonymous
 5 years ago
A block of mass 30 kg is being brought down by a chain. If the block acquires a speed of 40cm/s in dropping down 2m. The work done by the chain during the process will be..??
anonymous
 5 years ago
A block of mass 30 kg is being brought down by a chain. If the block acquires a speed of 40cm/s in dropping down 2m. The work done by the chain during the process will be..??

This Question is Closed

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0\[E = 1/2\times Mass \times Velocity^2\] Work done is the energy transferred during an action, so the work done during this example is equal to the kinetic energy transferred to the brick by the time it's finished moving those 2m. So, working out the kinetic energy from the equation above (E= 1.2 x ...) will give you the work done. Inputting the data you provided: \[E = 1/2 \times 30 \times (0.40)^2\] I've left the units out of the equation and have converted the speed of 40cm/s into metres/second to give 0.40 m/s. Working out this equation gives= 2.4J Thus, the kinetic energy of the brick, and thus the work done, to the brick whilst it has moved the 2m is 2.4J. Hope this helps!
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.