Physics E-1a
Homework Assignment #1 Solutions
Fall 2010
MC 2. The answer is d) If the car is heading east and slowing down so the positive acceleration must be in
the opposite direction or westward.
MC 3. The answer is a) The magnitude of the average velo
Physics E-1a
Solutions Homework #2
Fall 2010
MC 5 The answer is a) The quickest way across the river is to head directly across the river. All of the
boys velocity is directed towards the other shore. Of course his velocity with respect to the shore is th
Solutions Homework 3a09
Physics E-1a
Fall 2010
MC 1 Answer b) is False). From Newton's third law for every action there is an equal and opposite
action. Pulling on the handle causes a force to be applied to the block which and gives rise to a tension in
t
Solutions Homework 4a10
Physics E-1a
Fall 2010
MC 1 the answer is a) Draw a free body diagram for the problem and find the net force on the stone due to
the tension and gravity. With Newton's second law we have
! F = T + mg = ma = m
! F = 4 mg = m
v2
r
v2