# Physics lab force

Double Trouble in 2 Dimensions In Unit 2 we studied the use of Newton's second law and free-body diagrams to determine the net force and acceleration of objects. The purpose of this lab is to gain experience in working with vector quantities. The lab involves the demonstration of the process of the addition of several vectors to form a resultant vector. Graphical solutions for the addition of vectors will be carried out. Force table with pulleys, ring and string.

Metric ruler, protractor, graph paper Background: If several forces with different magnitudes and directions act at a point its net effect can be represented by a single resultant force. This resultant force can be found using a special addition process known as vector addition. In the process of vector addition, each vector to be added is first resolved into components as shown in Figure 1. The components along each axis are then added algebraically to produce the net components of the resultant vector along each axis.

This leads to the following: A force equal in magnitude and opposite in direction to R must be applied to keep the object in Physics lab force. We will use an instrument called the Force Table. A ring is placed around a pin in the center of the force table.

Strings attached to the ring pull it in different directions.

A force board (or force table) is a common physics lab apparatus that has three (or more) chains or cables attached to a center ring. The chains or cables exert forces upon the center ring in . As with all physics laboratory experiments, one must be careful to use the appropriate units. If all forces (i.e., the magnetic force and weight) are measured in newtons (), charges in coulombs (), and velocities in meters per second (), then from Equation 1 the unit of the magnetic field is given as newton per coulomb-meter per second. Explore the forces at work when pulling against a cart, and pushing a refrigerator, crate, or person. Create an applied force and see how it makes objects move. Change friction and see how it affects the motion of objects.

The magnitude strength of each pull and its direction can be varied. The magnitude of the string tension force is determined by the amount of mass that is hung from the other end of the string.

The force table allows you to demonstrate when the sum of forces acting on the ring equals zero. Under this equilibrium condition, the ring, when released, will remain on the spot. Mount the Force Table in parallel to the working desk horizontal position.

Be sure that it is level. Experiment with two forces: Place a pulley at the 30o mark on the Force Table and place a total of 0.

Place a second pulley at o mark and place a total of 0. Calculate the magnitude of the forces produced by these masses and record them in Table 1. Determine by trial and error See Appendix the magnitude of mass needed and the angle at which it must be placed in order to place the ring in equilibrium.

The ring is in equilibrium when it is centered on the Force Table. Be sure that all the strings are in such a position that they are directed along a line that passes through the center of the ring. From the experimentally determined mass, calculate the force produced and record the magnitude and direction of this equlibrant force in Table 1.

From the value of the equlibrant force, determine the magnitude and direction of the resultant force and record them in Table 1. Find the resultant of these two applied forces by scaled graphical construction using the parallelogram method See Appendix. Using a ruler and a protractor, construct vectors whose scaled length and direction represent F1 and F2.

Read the magnitude and direction of the resultant from your graphical solution and record them in Table 2. Using equation 1, calculate the components of F1 and F2 and record them into the analytical solution portion of Table 3.It is in the laboratory that physics students learn to practice the activities of scientists - asking questions, performing procedures, collecting data, analyzing data, answering questions, and thinking of new questions to explore.

As with all physics laboratory experiments, one must be careful to use the appropriate units. If all forces (i.e., the magnetic force and weight) are measured in newtons (), charges in coulombs (), and velocities in meters per second (), then from Equation 1 the unit of the magnetic field is given as newton per coulomb-meter per second.

Explore the forces at work when pulling against a cart, and pushing a refrigerator, crate, or person. Create an applied force and see how it makes objects move. Change friction and see how it affects the motion of objects. This lab/learning activity is designed to introduce students to the idea of how direction of force relative to motion determines the future motion of the object subjected to the force.

Students can also explore the factors that determine the properties of the motion.

## McCulley's HTML 5 Physics Lab Simulations

Physics Laboratory Report Sample PHY Lab Report Newton's Second Law Your Name: Partner's Full Name(s): accelerated glider moving along a flat track. We varied both the accelerating force and the mass of the glider.

We found that for a given force the . This lab/learning activity is designed to introduce students to the idea of how direction of force relative to motion determines the future motion of the object subjected to the force. Students can also explore the factors that determine the properties of the motion.

Physics Lab: Magnetic Force due to a Current-carrying Wire