Written Homework 7 Solutions

# Written Homework 7 Solutions - Written Homework due Tuesday...

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Physics 221 Fall2}07 Written Homework due Tuesday October 09 l-- An S0 kg painter falls offof a scaffold that is 8.0 m above the ground. Assume that as the painter hits the ground he comes to rest in 0. 15 s. (a) What is the average acceleration associated with "hitting the ground"? (b) What is the impulse that the painter receives from the floor?

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Physics 221Fall2007 Written Homework due Tuesday October 09 2-- An iron ball of mass 0.500 kg is fastened to a cord that is 70.0 cm long. The far end of the cord is rigidly fixed, forming a pendulum-like device. The ball is released when the cord is horizontal (see sketch). At the bottom of the path the ball strikes a Z.5A kg steel block that is initially at rest on a frictionless surface. The collision is elastic. (a) Find the velocity of the ball right after
Physics 221 Fall2007

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Unformatted text preview: Written Homework due Tuesday October 09 3-- Abilliardball, movingataspeedofZ.Zmls, strikesanidentical, stationaryballa glancing blow. After the collision, one ball is found to be moving at a speed of l.l mls in a direction making a 60 degree angle with the original line of motion. (a) Find the velocity of the other ball. (b) Gven these data, is the collision elastic or inelastic? Physics 221Fall2007 Written Homework due Tuesday October 09 4-- An 80 kg sttrdent stands on a 20 kgraft that can move without friction or drag on a lake. Both areinitially atrest. The student suddenly startsto run at a speed of 3.0 m/s with respect to the raft, along its length. (a) Describe and explain what happens to the center o1*u5 of the student / raft system. (b) How fast is the student moving with respect to the water? (c) How fast is the raft moving with respect to the water?...
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## This homework help was uploaded on 03/27/2008 for the course PHYS 221 taught by Professor Herrera-siklody during the Fall '08 term at Iowa State.

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Written Homework 7 Solutions - Written Homework due Tuesday...

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