Module 3—Effects of Force on Velocity
Read
To get a perspective that will help in solving the following assignment questions, read ”Applying Newton’s Second Law to Horizontal Motion” on pages 149 to 151 of your textbook.
Module 3: Lesson 5 Assignment
Remember to submit the answers to TR 1, TR 2, TR 3, and TR 4 to your teacher as part of your Module 3: Lesson 5 Assignment.
Try This
TR 1. A crate of bananas with a mass of 25.0 kg is dragged across a level floor by an applied force of +150 N [E] against a frictional force of 50.0 N [W]. What is the observed acceleration of the crate?
TR 2. A milk carton with a mass of 2.00 kg is pulled across a table with a horizontal force of 3.00 N. If the coefficient of friction is 0.110, what is the acceleration of the milk carton?
TR 3. A box of cereal is pushed with an applied force of 2.4 N [W] across a table. If the cereal box has a mass of 2.5 kg and the box accelerates at 0.41 m/s2 [W], what is the force of friction? What is the coefficient of friction for the table top?
TR 4. A 5.0-kg toolbox is pulled west across a concrete floor with a rope. The rope makes an angle of 45.0° with the floor. A force of 85.0 N is exerted on the rope, and the force of friction is 15.0 N parallel to the floor. Calculate the acceleration of the box.
In the previous lesson you drew free-body diagrams for several objects that were connected, either by touching or joined by a cord. In the following lab you will extend that understanding and calculate the accelerations and forces involved in these interactions.