A box with a mass of 5 kg sits on a flat table. The Earth pulls on this object with force equal to the weight of the object (49N).    If this is the action force, what is the reaction force?   The table pushing down on the floor with force of 49N.      The box pushing down on the table with force of 49N.      The normal force pushing up on the box with force of 49N.      The box pulling upward on the Earth with force 49N

An 18.5 lb box is placed on the ground. What force (in lb) does the ground exert on the box? (magnitude and direction). A cord is attached to the box and run through a pulley directly above the box, so that the cord is vertical. The free end of the cord is then connected to a hanging weight. Calculate the force exerted by the ground on the box (in lb), if the hanging weight is 12.0 lb (magnitude and direction) A 29.0 lb weight is substituted for the 12.0 lb weight. Calculate the new force (in lb) exerted by the floor on the box (magnitude and direction).

Suppose one's hand exerts a force of 15 N upward on a book weighing 12 N. The reaction to the force of the hand on the book is a force of12 N exerted by the book on the hand.3 N exerted by the book on the hand. 15 N exerted by the book on the hand.12 N exerted by the book on the Earth.10 N exerted by the Earth on the book.

The Earth pulls on the Moon with an average force of 2.0×10^20 N. (A number that is literally astronomically large.) The Moon in turn pulls on the Earth with a force of _____ N.

76. A rescue helicopter is lifting a man (weight = 822 N) from a cap- sized boat by means of a cable and harness. (a) What is the tension in the cable when the man is given an initial upward acccleration of 1.10 m/s²? (b) What is the tension during the remainder of the rescue when he is pulled upward at a constant velocity?

A box of mass m1 rests on a smooth, horizontal floor next to a box of mass m2. suppose the force of 20.0 N pushes on two boxes of unknown mass.

An astronaut on the moon places a package on a scale and finds its weight to be 35 N. (a) What would the weight of the package be on the earth?                      N(b) What is the mass of the package on the moon?                      kg(c) What is the package's mass on earth?                       kg

A mass of 3.22 kg is on a horizontal surface. An applied force of 25.7 N at an angle of -25.5 degrees with respect to the horizontal acts on the mass. What normal force does the surface exert on the mass? (Assume that gravity is in the system)

Which of the following are always true of an object that is at equilibrium? Include all that apply. All the forces acting upon the object are equal. The object is at rest. The object is moving and moving with a constant velocity. The object has an acceleration of zero. There is no change in the object's velocity. The sum of all the forces is 0 N. All the forces acting upon an object are balanced.

Two forces act on an 5 kg object: F1 = 60N applied at the origin in the direction of positive x- axis, and F2 = 40N, also applied at the origin but in the direction of positive y- axis. Find the direction of the net Force (Hint: its given by the angle between positive x-axis and the direction of net force)