1.A crate with a mass of 15 kg is being dragged across the ground at a constant velocity of 2.0 m/s by an applied horizontal force of 30 N. (a) Name the other horizontal force acting on the crate. What is the magnitude and direction of that force? (b) How much applied force is required in order to accelerate the crate from a speed of 2.0 m/s to 7.0 m/s in 4.0 s?

College Physics
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ISBN:9781285737027
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter4: The Laws Of Motion
Section: Chapter Questions
Problem 7WUE: Calculate the normal force on a 15.0 kg block in the following circumstances: (a) The block is...
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1.A crate with a mass of 15 kg is being dragged across the ground at a constant
velocity of 2.0 m/s by an applied horizontal force of 30 N.
(a) Name the other horizontal force acting on the crate. What is the magnitude
and direction of that force?
(b) How much applied force is required in order to accelerate the crate from a
speed of 2.0 m/s to 7.0 m/s in 4.0 s?
2. A person weighs a 5.0 kg fish using a spring scale attached to the ceiling of an
elevator. What does the spring scale read in Newtons when the elevator is
accelerating upwards at 2.0 m/s?? What does the spring scale read when the
elevator is moving at a constant velocity of 3.0 m/s?
3. A 1 kg hanging mass is connected by a string over a pulley to a 2 kg block resting
on a flat, smooth table. Calculate the acceleration of the system and the tension in
the string. Be sure to include complete free body diagrams for each block in your
solution.
4. A block is placed on a 30° ramp and is observed to slide down the ramp with an
acceleration of 2 m/s?. What is the coefficient of friction between the block and the
ramp?
5. Two horizontal forces of 100 N [N] and 80 N [S 30° W] act on an object with a
mass of 10 kg. What is the acceleration of the object? Note: this problem requires a
full vector solution
Transcribed Image Text:1.A crate with a mass of 15 kg is being dragged across the ground at a constant velocity of 2.0 m/s by an applied horizontal force of 30 N. (a) Name the other horizontal force acting on the crate. What is the magnitude and direction of that force? (b) How much applied force is required in order to accelerate the crate from a speed of 2.0 m/s to 7.0 m/s in 4.0 s? 2. A person weighs a 5.0 kg fish using a spring scale attached to the ceiling of an elevator. What does the spring scale read in Newtons when the elevator is accelerating upwards at 2.0 m/s?? What does the spring scale read when the elevator is moving at a constant velocity of 3.0 m/s? 3. A 1 kg hanging mass is connected by a string over a pulley to a 2 kg block resting on a flat, smooth table. Calculate the acceleration of the system and the tension in the string. Be sure to include complete free body diagrams for each block in your solution. 4. A block is placed on a 30° ramp and is observed to slide down the ramp with an acceleration of 2 m/s?. What is the coefficient of friction between the block and the ramp? 5. Two horizontal forces of 100 N [N] and 80 N [S 30° W] act on an object with a mass of 10 kg. What is the acceleration of the object? Note: this problem requires a full vector solution
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