Question

Lab Final Lab 2053 Questions “Density of Unknown Material: Measurements and Graphing.” 1. In your own words define density and explain what would you determine the density of an object? 2. What is the meaning of the slope of the lines in your Mass vs. Volume graph? 3. Determine the mathematical relationship between mass and volume.

Vector Addition 1. 1.Given that vector ? ⃗=? ⃗+? ’⃗ , indicate the conditions that A and B have to meet in order for C to have the largest and smallest possible magnitudes. 2. What are vectors? How are they represented? 3. Explain how vectors are add geometrically; 4. Explain how to add vectors algebraically, include the necessary notation and equations?

“Determining the Free Fall Acceleration.” 1. List the factors that might affect the time it takes for an object to fall from a certain height. 2. Define New Terms: Free Fall Acceleration, Air Resistance, and Terminal Velocity. 3. Offer a brief explanation for the discrepancy between the accelerations of the small and large balls for free falling.

“Determining the gravitational acceleration from the Incline.” 1. Describe the motion of an object as it moves up a frictionless the incline? 2. Describe the motion of an object along a horizontal incline? 3. How well does the extrapolated value agree with the accepted value of free-fall acceleration (g = 9.8 m/s2)? 4. Discuss the validity of extrapolating the acceleration value to an angle of 90. 5. Define friction and frictionless surface?

“Mass, Weight, and Reading on the scale.” 1. In your own words explain the difference between weight and mass.
2. Define Normal Force. 3. Explain why the reading on the force scale changes while you are riding the elevator? 4. Can the scale read zero while you are standing on it? Explain.

“Friction force” 1. A man wants to compute the kinetic coefficient friction of a surface. Can you design an experiment to allow to get this value? 2. Does the force of kinetic friction depend on the weight of the block? Explain.

“Energy” 1. Draw a diagram of Potential Energy vs position in a conservative system. 2. In order to avoid experimental errors, you had to consider some experimental conditions. Can you do some mention these? Explain.

“Momentum” 1. What is the relationship between momentum and impulse? 2. Can you express the second Newton Law in momentum function? Explain when the momentum is conserved? For that, using in the experiment done.

Data processing: 1. Define: Average, standard deviation, and variance of a physical magnitude. 2. Using the data in the following table make two plots (y vs t and y vs t^2) and select the most convenient plot to: a.1 Obtain the slope and associate it with a physics magnitude according to the data. a.2 Compute the standard deviation. t (s) 1 2 3 4 5 6 7 8 9 y (m) 1 4.5 8.8 17.2 24.6 34.8 45.3 68.4 79.4

Answer 1

Density is a magnitude that measures the relationship between mass and volume of a given body. This relationship is independent of the amount of matter.

For a mass vs volume plot, we have:

Remember the

Then:

If the vertical axis is the mass and the horizontal axis is the volume, then:

slope=ρ=density