A box is pushed across a smooth (frictionless) table and is sliding away from the person who delivered the push. After the box lost contact with the hands of the person who was pushing it the forces acting on the box are
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A box is pushed across a smooth (frictionless) table and is sliding away from the person who delivered the push. After the box lost contact with the hands of the person who was pushing it the forces acting on the box are
a) Only gravity
b) Only the force that keeps the box moving forward
c) Gravity, and the force that keeps the box moving forward
d) Normal force from the table and gravity
e)Normal force from the table, gravity, and the force that keeps the box moving forward
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- An object on a rope is lowered at a steadily decreasing speed? Which is true? a) The rope tension is greater than the object's weight. b) The rope tension equals the object's weight. C) the rope tension is less than the object's weight. d) The rope tension can't be compared to the object's weight.Which of the following statements are true of an object that experiences balanced forces (or unbalanced forces)? List all that apply. If a person is moving to the right, then the forces acting upon it are NOT balanced. A balance of forces is demonstrated by an object which is slowing to a stop. It would take an unbalanced force to keep an object in motion. If an object is moving with a constant speed in a circle, then the forces acting upon the object are balanced. If an object is accelerating at a constant rate of acceleration, then the forces acting upon the object are balanced. It is NOT possible for just three forces to be acting upon an object and they still balance each other. A free-falling object experiences a balance of forces. Balanced forces cause stationary objects to remain at rest and moving objects to come to rest. Unbalanced forces cause objects to move.In the given figure below, both masses m1 and m2 are attached with a string. Mass m1 is moving on its right, and mass m2 is moving downwards. What is the force, which is opposite to the friction, on the mass m1 (mass on the table). m1 M-₂ O Tension on the string, acting on the left side of mass m1 Weight of mass m1 O Normal force on mass m1 No answer text provided. O Tension on the string, acting on the right side of mass m1
- A 20 kg box rests on a table. a) What force does the earth exert on the box? Draw a free body diagram and determine b) What force does the box exert on the earth? c) What force does the table exert on the box? d) What force does the box exert on the table?Two people each have a mass of 125 KG they are both in an elevator that has a massive 200 KG when the elevator begins to move the people in the elevator have an upward acceleration of 1.5m/s^2 what is the net force The X on the elevator as it accelerates upwards at 1.50 m/s^2?While in space far from any gravitational body, a 120-kg astronaut pushes off a 2400 kg space vehicle. The contact lasts .25 seconds, after which the astronaut is traveling 1 m/s a) what's the magnitude of the pushing force? b) what's the speed of the vehicle after the contact has ended? c) how is Newton's 3rd law demonstrated?
- A man is pulling up on a rope which is redirected around a massless frictionless pulley. The box is partially resting on the floor. The elevator is traveling upwards but slowly a) imagine a scale is placed under the box. Which of these forces on the box represents what the scale reads? b) solve for the scale reading w the following values: m=10kg, a=2m/s^2, force of box on rope = 5N, force of box on man = 600N c) what is the 3rd law reaction pair to Force of box on earth in 2 subscript notation?Body A weighs 109 N, and body B weighs 30 N. The coefficients of friction between A and the incline are μ = 0.56 and μk = 0.25. Angle is 40°. Let the positive direction of an x axis be up the incline. Frictionless, massless pulley A B (a) Find the acceleration of A if A is initially at rest. m/s²) î (b) Find the acceleration of A if A is moving up the incline. m/s²) î (c) Find the acceleration of A if A is moving down the incline. ( m/s²) î