Friday
October 31, 2014

Homework Help: physics

Posted by Anna on Thursday, November 18, 2010 at 3:07am.

Two masses are connected by a string. Mass A is on a flat roof and mass B is hanging over the edge of the roof. The mass on the roof is 15 kg and the hanging mass is 5 kg. The edge of the roof is 100 m above the ground. The two masses are initially at rest with the hanging mass 80 m above ground and the roof mass 50 m from the edge. There is no friction.
(Allowed to use only work/energy no kinematics)

after three seconds of motion the masses have moved 11 m.

a) calculate the speed of the masses at this instant
b) calculate tension in the rope
c) at this instant the mass on the roof travels along a section with friction where u= .577. how far along the roof does this mass move before stopping (the masses are still connected)

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

Physics - Masses 15 kg and 8 kg are connected by a light string that passes over...
Physics help - Two masses m1 = 2 kg and m2 = 4 kg are connected by a light ...
physics - A block of mass 2 kg is connected to a freely hanging block of mass 4 ...
Science: Physics and Chemistry - I was given a systems equation. Two masses are ...
Science: Physics and Chemistry - Can someone please help me with this??? I was ...
physics - A 12 kg mass on a horizontal friction-free air track is accelerated by...
science - I was given a systems equation. Two masses are on a flat frictionless...
physics - In the figure below, a solid cylinder of radius 12 cm and mass 11 kg ...
physics - a 15.0 kg mass and a 2.00 kg mass are connected bya string that passes...
physics - two masses m' each are hanging with help of a light string,which ...

Search
Members