PHY 2048
Midterm Exam 
DAY
Fall 2008
Use g = 9.80 m/s .
1. [20 points]
A 7.83 kg mass slows down from 48.7 m/s to 29.8 m/s while sliding 32.3 m.
Find its
acceleration
and the
time
it took for this to happen.
Give your wellorganized calculation below.
Indicate your answers clearly.
2. [15 points]
A 0.183 kg bullet is moving to the right at 946 m/s when it strikes an 8.96 kg
wooden box that is initially at rest.
The bullet goes through the box and is
observed to be moving at 635 m/s to the right after the collision.
What is the speed of the box immediately after the collision?
3. [20 points]
An object is launched from a point at
ground level (take this as the origin)
and lands on the ground 3.84 seconds
later.
The landing point is 739 m away
(horizontally) and
38.4 m below
the
launching point.
Ignore air friction.
What was the initial velocity?
Give your answer in component form.
4. [15 points]
A satellite of mass 327 kg is in an orbit that is 3641 km above the surface of
the earth.
Find its acceleration due to gravity.
The other data you need are
on the front of the exam:
G
=
kg
m
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 Fall '08
 Laposky,E
 Physics, Acceleration, Force, Friction, Mass, kg

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