Thursday
March 23, 2017

Post a New Question

Posted by on Saturday, December 8, 2012 at 1:08pm.

A 400 kg baby grand piano is raised to the roof of a 100 m building. If the cable breaks as it reaches this height, what will its velocity be the instant prior to impact? Use energy considerations and verify using kinematics.

  • Physics - , Saturday, December 8, 2012 at 6:09pm

    (a) using dynamics
    mgh=mv²/2
    v=sqrt(2gh)
    (b) using kinenatics
    h=gt²/2 =>sqrt(2h/g)
    v=gt=gsqrt(2h/g)=sqrt(2gh)

Answer This Question

First Name:
School Subject:
Answer:

Related Questions

More Related Questions

Post a New Question