L. Consider the following physical situations: 1. A5-kg box resting on top of a table. 2. A 10-N force is applied to a 5-kg box to accelerate it to the right across a table. The box encounters a force of friction of 5 N. 3. A5-kg box is being pulled up the inclined plane by a 10-N force. The box encounters a force of friction of 5 N. The plane is 8m and is inclined 20° from the horizontal. a) Construct free-body diagrams for the following physical situations at the instant in time for which they are described. As it is always done in free-body diagrams, label the forces according to type and draw the arrows such that their length reflects the magnitude of the force. (" situation) b) Consider situation 3, calculate the net force acting on the box and the acceleration of the box. c) Consider situation 3, calculate work done by the force of gravity and done by friction.
L. Consider the following physical situations: 1. A5-kg box resting on top of a table. 2. A 10-N force is applied to a 5-kg box to accelerate it to the right across a table. The box encounters a force of friction of 5 N. 3. A5-kg box is being pulled up the inclined plane by a 10-N force. The box encounters a force of friction of 5 N. The plane is 8m and is inclined 20° from the horizontal. a) Construct free-body diagrams for the following physical situations at the instant in time for which they are described. As it is always done in free-body diagrams, label the forces according to type and draw the arrows such that their length reflects the magnitude of the force. (" situation) b) Consider situation 3, calculate the net force acting on the box and the acceleration of the box. c) Consider situation 3, calculate work done by the force of gravity and done by friction.
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