A bullet with a mass of 5.04 g and a speed of 597 m/s penetrates a...
A bullet with a mass of 5.04 g and a speed of 597 m/s penetrates a tree to a depth of 4.05 cm.
(a) Use work and energy considerations to find the average
frictional force that stops the bullet.
N
(b) Assuming that the frictional force is constant, determine how
much time elapsed between the moment the bullet entered the tree
and the moment it stopped.
s
A force F = (3x i +
4y j) N acts on an object as it moves in
the x direction from the origin to x = 4.95 m.
Find the work done on the object by the force.
J
Homework Answers
Concept - use work energy theorem to find the
required friction force as shown below. Find the acceleration using
the frictional force and mass. Then use equation of kinematics to
find the time elapsed.
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