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PHYS 2001 : Final Exam - All Notes

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azuremammoth471
15 Mar 2019
School
LSU
Department
Physics
Course
PHYS 2001
Professor
All

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Document Summary

Static frictional force - overcome to get an object to begin moving. Kinetic fritional force - overcome to keep an object moving. The object may still be moving - constant velocity: non-equilibrium conditions, object(s) accelerating, net force not equal to zero. The only force acting on the satellite is gravity. To stay in contact with a loop at the top of the loop, normal force cannot be 0. Chapter 6: work and energy: work done by a constant force, energy. Energy is the ability to do work: work, depends on displacement and force, measured in joules, no displacement means no work done. In the equation for work, force is the component of the force along the direction of motion. Ke increases: linearly with mass, with the square of velocity. If an object isn"t moving staight along the vertical, need the displacement in y-direction to find wgrav: doesn"t depend on path taken, only on initial and final heights.

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Related textbook solutions

Physics: Principles with Applications
7th Edition, 2013
Giancoli
ISBN: 9780321625922

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Related Questions

1. The SI unit of force, newton, is a compound unit, which can be written as _____.

  •  
  •  
  •  
  •  

2. According to the Newton's 2nd Law of Motion, when forces exerted on an object are not balanced, the object will accelerate.

  • True
  • False

3. An object with mass 27.7 kg is suspended at rest on a string, what is the tension force magnitude (in unit of newton) in the string?

4. In the equation , represents the sum of all forces on an object.

  • True
  • False

5. An object moving with a constant velocity will experience ______ net force.

  • nonzero
  • zero
  • imaginary

6. Assuming that a constant net force is applied to an object, if the mass of the object increases then the acceleration will ____.

  • increase
  • decrease
  • stay the same

1. The SI unit of force, newton, is a compound unit, which can be written as________. 

(a)  

(b)  

(c)  

(d)  

 

2. According to Newton's 2nd law of motion, when forces exerted on an object are not balanced, the object will accelerate. 

(a) true

(b) false

 

3. An object with a mass of 27.7 kg is suspended at rest on a string, what is the tension force magnitude (in the unit of newton) in the string? 

 

4) In the equation represents the sum of all forces on an object

(a) true

(b) false

 

5) An object moving with a constant velocity will experience _______ net force.

(a) nonzero

(b) zero 

(c) imaginary

 

6) Assuming that a constant net force is applied to the object, if the mass of the object increases, then the acceleration will _________.

(a) increase

(b) decrease 

(c) stay the same 

1. Which of the following describes an object with a non-zero netforce acting on it? Choose all that apply.
The moped accelerated while making a left turn.
The motorcycle traveled at a constant speed while making au-turn.
The truck slowed down while making a right turn.
The spaceship traveled at a constant speed in a straightline.
The car sped up from 50 mph to 65 mph while moving in a straightline.

2. If you observe that an object is accelerating, what should youconclude?
A non-zero net force is acting on it. Only forces causeacceleration. As such, if an object is accelerating it must bebecause a non-zero net force is acting on it.
It must be in free fall.
It must be changing direction. Acceleration is a vector and vectorshave both magnitude and direction. Thus if an object isaccelerating it must be changing direction.
The forces acting on the object must be greater than the forces theobject is exerting.
It must be speeding up. If an object is accelerating that means itis speeding up.

3. Which of the following are true according to Newton's 2nd Law?Choose all that apply.

If the acceleration is zero, then the net force is zero.
If you apply the same force to 2 objects, the one with more masswill have a greater acceleration.
If you apply the same force to 2 objects, the one with less masswill have a greater acceleration.
If two objects have the same acceleration, the one with less masswill have a larger net force exerted on it.
If two objects have the same acceleration, the one with more masswill have a larger net force exerted on it.
The larger the net force on an object is, the larger theacceleration.
The larger the net force on an object is, the smaller theacceleration.

4. A box is on the Moon. The box weighs 152 lb and is in free fall.How much force is the box exerting on the Moon and in whatdirection?

lb
Up
Down
Right
North
East
West
Left
South

5. Which of the following are the correct units for mass? Chooseall that apply.
slugs
u
kg·m/s2
g
N
m/s2
oz
lb

6. If an object is traveling in a circle, which of the followingmust be TRUE? Choose all that apply.
The object is slowing down.
The object is speeding up.
The object has a net force acting on it.
The object has a constant velocity.
The object is accelerating.