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Normal Force

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In Fig a car is driven at constant speed over a circular hill and then into a circular valley with the same radius. At the top of the hill, the normal force on the driver from the car seat is 0. The driver's mass is 80.0 kg. what is the magnitude of the normal force on the driver from the seat when the car passes through the bottom of the valley?

The angle between the resultant contact force and the normal force exerted by a body on the other is called the angle of friction. Show that it lamda be the angle of friction and mu the coefficient of static friction. lamdaletan^-1mu .

Knowledge Check

  • A wooden box is placed on a table. The normal force on the box from the table is N_(1) . Now another identical box is kept on first box and the normal force on lower block due to upper block is N_(2) and normal force on lower block by the table is N_(3) . For this situtation, mark out the correct statement (s).

    A
    `N_(1)=N_(2)=N_(3)`
    B
    `N_(1) lt N_(2) =N_(3)`
    C
    `N_(1)=N_(2) lt N_(3)`
    D
    `N_(1)=N_(2) gt N_(3)`

  • A force P pulls on a crate of mass m that is in contact with a rough surface. The figure shows the magnitudes and directions of the forces that act on the crate in this situation. W represents the weight of the crate. Fy represents the normal force on the crate, and F represents the frictional force. What is the magnitude of F, the normal force on the crate?

    A
    57 N
    B
    160 N
    C
    230 N
    D
    80 N

  • A 250 N force is directed horizontally as shown in the figure to push a 29 kg box up an inclined plane at a constant speed. Determine the magnitude of the normal force, F_(N) and the coefficient of kinetic friction, mu_(2)

    A
    `{:(F_(N),mu_(k)),(330N ,0.31):}`
    B
    `{:(F_(N),mu_(k)),(310N ,0.33):}`
    C
    `{:(F_(N),mu_(k)),(290N ,0.30):}`
    D
    `{:(F_(N),mu_(k)),(370N ,0.26):}`

    • Similar Questions

    Explore conceptually related problems

    A uniform ladder of mass 10 kg leans against a smooth vertical wall making an angle of 53^0 with it. The other end rests on a rough horizontal floor. Find the normal force and the frictional force that the floor exerts on the ladder

    A stationary uniform rod of mass 'm', length 'l' leans against a smooth vertical wall making an angle theta with horizontal floor. Find the normal force & frictional force that is exerted by the floor on the rod ?

    A uniform metallic rod PQ of length 2 m is acted upon by two forces A and B along the directions as shown in the figure. Find the magnitude and position of the resultant normal force that acts on the rod.

    A force P pulls on a crate of mass m that is in contact with a rough surface. The figure shows the magnitudes and directions of the forces that act on the crate in this situation. W represents the weight of the crate. Fy represents the normal force on the crate, and F represents the frictional force. Which statement best describes the motion of the crate?

    An object is being pushed at constant speed on an inclined plane. The free body diagram of the object is shown with the gravitational force represented by W, the friction force by f, the applied external push parallel to the incline by F, ad the normal force with surface by N. Which one of the following choices represents correct relationships between the forces?

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