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    3NAB0 - Problems Chapter 4

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    seher
    This document contains 5 physics problems about Newton's Laws of Motion. Problem 4.1 involves calculating force components for a man dragging a trunk up a loading ramp. Problem 4.2 calculates the mass of a block of ice pushed across the floor. Problem 4.3 involves drawing free-body diagrams for a ball hanging from a string in a moving train. Problem 4.4 calculates accelerations and tensions for two crates connected by a rope being pulled across ice. Problem 4.5 involves drawing free-body diagrams and calculating accelerations and tensions for two blocks connected by a rope with mass.

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    3NAB0 - Problems Chapter 4

    Uploaded by

    seher
    15 views2 pages
    This document contains 5 physics problems about Newton's Laws of Motion. Problem 4.1 involves calculating force components for a man dragging a trunk up a loading ramp. Problem 4.2 calculates the mass of a block of ice pushed across the floor. Problem 4.3 involves drawing free-body diagrams for a ball hanging from a string in a moving train. Problem 4.4 calculates accelerations and tensions for two crates connected by a rope being pulled across ice. Problem 4.5 involves drawing free-body diagrams and calculating accelerations and tensions for two blocks connected by a rope with mass.

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    This document contains 5 physics problems about Newton's Laws of Motion. Problem 4.1 involves calculating force components for a man dragging a trunk up a loading ramp. Problem 4.2 calculates the mass of a block of ice pushed across the floor. Problem 4.3 involves drawing free-body diagrams for a ball hanging from a string in a moving train. Problem 4.4 calculates accelerations and tensions for two crates connected by a rope being pulled across ice. Problem 4.5 involves drawing free-body diagrams and calculating accelerations and tensions for two blocks connected by a rope with mass.

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    15 views2 pages

    3NAB0 - Problems Chapter 4

    Uploaded by

    seher
    This document contains 5 physics problems about Newton's Laws of Motion. Problem 4.1 involves calculating force components for a man dragging a trunk up a loading ramp. Problem 4.2 calculates the mass of a block of ice pushed across the floor. Problem 4.3 involves drawing free-body diagrams for a ball hanging from a string in a moving train. Problem 4.4 calculates accelerations and tensions for two crates connected by a rope being pulled across ice. Problem 4.5 involves drawing free-body diagrams and calculating accelerations and tensions for two blocks connected by a rope with mass.

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    of 2

    Chapter 

    4 – Newton’s Laws of Motion
    Problem 4.1*
    A man is dragging a trunk up the loading ramp of a
    mover’s truck. The ramp has a slope angle , and the
    man pulls upward with a force whose direction
    makes an angle with the ramp. The gravity is .

    a. When a certain force is applied, how big is the


    component parallel to the ramp then? Express
    in the given variables.
    b. How large will the component perpendicular to
    the ramp be then? Express in the given
    variables.

    Problem 4.2**
    A dockworker applies a constant horizontal force to a block of ice on a smooth horizontal
    floor. The frictional force is negligible. The block starts from rest and moves a distance in a
    time .
    a. What is the mass of the block of ice?
    b. If the worker stops pushing after , how far does the block move between and
    2 ?

    Problem 4.3*
    A ball is hanging from a long string that is tied to the ceiling of a train car traveling eastward
    on horizontal tracks. An observer inside the train car sees the ball hang motionless. Draw a
    clearly labeled free-body diagram for the ball if
    a. the train has a uniform velocity and
    b. the train is speeding up uniformly.
    c. Is the net force on the ball zero in either case? Explain

       

    3NAB0 ‐ Chapter 4 – Newton’s Laws of Motion 
    Figures adapted from Young and Freedman, University Physics ed.12 
    Problem 4.4*
    Two crates with masses and ( ), sit on the frictionless surface of a frozen
    pond, connected by a light rope (see figure). A woman wearing golf shoes (for traction) pulls
    horizontally on the second crate with a force that gives the crate an acceleration .

    a. What is the acceleration of the first crate?


    b. Draw a free-body diagram for the crate with mass . Use that diagram and Newton’s
    second law to find the tension in the rope that connects the two crates.
    c. Draw a free-body diagram for the crate with mass . What is the direction of the net
    force on this crate? Which is larger in magnitude, or ?
    d. Use part (c) and Newton’s second law to calculate the magnitude of .

    Problem 4.5** 
    The two blocks in the figure with masses and are connected by a
    heavy uniform rope with a mass . An upward force is applied as
    shown. The gravity is .
    a. Draw three free-body diagrams: one for the block with mass , one
    for the rope, and another one for the block with mass . For each
    force, indicate what body exerts that force.
    b. What is the acceleration of the system?
    c. What is the tension at the top of the heavy rope?
    d. What is the tension at the midpoint of the rope?

    3NAB0 ‐ Chapter 4 – Newton’s Laws of Motion 
    Figures adapted from Young and Freedman, University Physics ed.12 

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