Algebra Based Physics 1 Lab Final

Questions and Answers

You are told to plot a graph of position vs. time. Which of the following is true?

You are free to plot position and time on either axis

Position goes on the y axis and time goes on the x axis (correct)

Without further information it is impossible to know which quantity goes on which axis

Position goes on the x axis and time goes on the y axis

Given your standard kinematic equation $v = at + v_0$, when asked to graph velocity vs. time, graphically $v_0$ would correspond to?

The slope of the line

The independent value

The y-axis intercept (correct)

The dependent value

You are asked to plot velocity vs. time. The slope of this graph will represent what physical quantity?

Velocity

Displacement

Time

Acceleration (correct)

You have a position vs. time graph. Calculate the slope of the graph with points (1.0s, 5.2m) and (3.7s, 6.4m).

0.44 m/s Signup and view all the answers

When recording a manual measurement, which of the following is more correct?

The number of digits to be recorded depends on the instrument being used, and the last digit, in the number recorded, will be a guess Signup and view all the answers

The SI units for mass, length, and time are?

kilograms, meters, seconds Signup and view all the answers

Main measuring devices used?

Metric ruler, micrometer, vernier caliper, laboratory balance Signup and view all the answers

When a mass is being uniformly accelerated, that means?

The mass is moving with a constant acceleration Signup and view all the answers

What are the main three graphs made?

Acceleration vs. time, velocity vs. time, position vs. time Signup and view all the answers

Which of the following equations will describe the velocity vs. time graph?

v = v_0 + at Signup and view all the answers

The graph of acceleration vs. time, more or less, will be:

A horizontal line with no slope Signup and view all the answers

The x-component of an object's velocity during projectile motion is?

Constant Signup and view all the answers

For a projectile fired on a constant level surface, at what angle is the maximum range obtained?

45 Signup and view all the answers

For a projectile fired on a constant level surface, its overall velocity is at a minimum when?

When the projectile is at its max height Signup and view all the answers

The Law of Conservation of Mechanical Energy says that in the absence of non-conservative forces, such as friction, the total mechanical energy possessed by a system is conserved.

True Signup and view all the answers

The SI unit for energy is?

Joule Signup and view all the answers

To determine the max height of the projectile, you will have to do which of the following calculations?

Subtract the height of the mini launcher from the measured height to calculate the max height Signup and view all the answers

The 'time of flight' of a projectile initially fired perfectly horizontal, is dependent upon which of the following?

Its initial height Signup and view all the answers

A centripetal force is any force that induces circular motion in an object. In our experiment, what served as the centripetal force?

The combination of the force of gravity and the tension in the string Signup and view all the answers

How is the centripetal force related to the radius of the circular path the mass is moving on?

The force is inversely proportional to the radius of the path Signup and view all the answers

How is centripetal force related to the tangential velocity of the mass?

The force is proportional to the square of the tangential velocity of the mass Signup and view all the answers

For an object moving in a circle, even if its speed is constant, there must be a non-zero net force acting on it to get it to change its direction of motion. Which of Newton's Laws tells us that if an object's state of motion is changing then there must be a non-zero force acting on it?

First Signup and view all the answers

The net force acting on the masses in this experiment is given by the equation.

F = (M2-M1)g Signup and view all the answers

Which of the following is the equation for the theoretical value of acceleration?

a = F/(M2+M1) Signup and view all the answers

If you plot net force vs acceleration, what physical quantity will the slope of that graph represent?

Mass Signup and view all the answers

Study Notes

Graphing Basics

Position is plotted on the y-axis while time is on the x-axis.
In velocity vs. time graphs, the initial velocity (vo) is the y-intercept.
The slope of a velocity vs. time graph represents acceleration.

Slope and Calculations

To calculate the slope of a position vs. time graph, use two data points; for example, points (1.0s, 5.2m) and (3.7s, 6.4m) yield a slope of 0.44 m/s.
Manual measurements require recording significant figures, where the last digit is an estimate of precision based on the measuring instrument used.

SI Units

The standard SI units are kilograms for mass, meters for length, and seconds for time.

Measurement Tools

Common measuring devices include metric rulers, micrometers, vernier calipers, and laboratory balances.

Motion Concepts

Uniform acceleration means a mass experiences constant acceleration in a straight line.
Main graphs in kinematics are acceleration vs. time, velocity vs. time, and position vs. time.

Kinematic Equations

The equation v = vo + at describes the relationship in velocity vs. time graphs.

Projectile Motion

In projectile motion, the x-component of velocity remains constant throughout the motion.
For a projectile, the overall velocity is minimized at maximum height.
Maximum range for projectile firing occurs at a 45-degree angle.

Energy Principles

The Law of Conservation of Mechanical Energy states that total mechanical energy in a system is conserved without non-conservative forces.
The SI unit for energy is the joule.

Projectile Height and Flight Time

The maximum height determination involves subtracting the launch height from the measured height.
Time of flight for a projectile is dependent on its initial height.

Circular Motion

Centripetal force induces circular motion, often a combination of gravity and tension.
Centripetal force is inversely proportional to the radius of the circular path and directly proportional to the square of the tangential velocity.
Newton's First Law indicates that a net force is needed for a change in an object's state of motion.

Forces and Acceleration

The net force equation is F = (M2 - M1)g.
The theoretical acceleration equation is a = F / (M2 + M1).
In a net force vs. acceleration graph, the slope represents mass.

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