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Chapter 5: Q 15. (page 128)
Figure shows an object’s acceleration-versus-force graph. What is the object’s mass?
mass of object is 25 kg
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A heavy box is in the back of a truck. The truck is accelerating to the right. Draw a motion diagram, a force-identification diagram, and a free-body diagram for the box .
Problems 35 through 40 show a free-body diagram. For each:
a. Identify the direction of the acceleration vector au and show it as a vector next to your diagram. Or, if appropriate, write
b. If possible, identify the direction of the velocity vector and show it as a labeled vector.
c. Write a short description of a real object for which this is the
correct free-body diagram. Use Examples 5.4, 5.5, and 5.6 as
models of what a description should be like.
Problems 42 through 52 describe a situation. For each, draw a motion diagram, a force-identification diagram, and a free-body diagram.
Your friend went for a loop-the-loop ride at the amusement
park. Her car is upside down at the top of the loop.
Exercises 27 describe a situation. Identify all forces acting on the object and draw a free-body diagram of the object.
A jet plane is accelerating down the runway during takeoff.
Friction is negligible, but air resistance is not.
For an object starting from rest and accelerating with constant acceleration, distance traveled is proportional to the square of the time. If an object travels 2.0 furlongs in the first 2.0 s, how far will it travel in the first 4.0 s?
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