Thursday
April 24, 2014

Homework Help: physics

Posted by Anonymous on Thursday, January 17, 2013 at 1:24am.

011 (part 1 of 5) 10.0 points
Two objects are connected by a string of negligible mass. The 12 kg block is placed on a
smooth table top 2.4 m above the floor, and
the 9 kg block hangs over the edge of the table. The 9 kg block is then released from rest
at a distance of 1.2 m above the floor at time
t = 0.
12 kg
9 kg
2.4 m
1.2 m
Determine the acceleration of the 9 kg block
as it descends. The acceleration of gravity is
9.8 m/s
2
.
Answer in units of m/s
2
How long dies it take the 9 kg block to strike
the floor?
Answer in units of s
013 (part 3 of 5) 10.0 points
Describe the motion of the 12 kg block from
the time t = 0 to the time when the 9 kg block
strikes the floor.
1. It moves with a decreasing acceleration.
2. It moves with an increasing acceleration.
3. It moves with a constant acceleration.
4. It moves with a constant speed.
5. It stays still.
014 (part 4 of 5) 10.0 points
Describe the motion of the 12 kg block from
the time the 9 kg block strikes the floor to the
time the 12 kg block leaves the table.
1. It stays still.
2. It moves with a constant speed.
3. It moves with a decreasing acceleration.
4. It moves with a constant acceleration.
5. It moves with an increasing acceleration.
015 (part 5 of 5) 10.0 points
Determine the distance between the landing
points of the two blocks.
Answer in units of m

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