Lab Equipment & FR
FR Skills
Common Questions
Fundamental Ideas
Equations to Remember
100

What equipment do we use to measure mass?

Mass Scale

100

What two things do we look at in an unfamiliar scenario problem?

1. Check which variables are on the numerator vs denominator

2. Check what the exponents are on each variable

100

What is the true about the forces between two objects if one of the objects is accelerating?

The forces are ALWAYS equal (Newton's 3rd Law)

100

Write down our rules for relating the three types of kinematics graphs (hint: this is a diagram)

A
V
X

100

How do we calculate the force of gravity?

F_g=mg

200

What phrase (or sentence stem) do we use when describing a measurement?

"Measure _____ with _____ "

200

On a lab design question, what do we always conclude a procedure with?

Multiple trials (at least 10) and changing the independent variable

200

What is the true about the center of mass velocity in a collision in which two objects stick together.

It is equal to the final velocity (and stays the same)

200

A ball is dropped and falls to the ground. How does the energy of the ball change?

The energy of the ball increases since it gains kinetic energy. (The energy of the ball-Earth system stays constant since Ug is converted to K)

200

What is the equation for conservation of momentum?

p_1+p_2=p'_1+p'_2

300

What piece of equipment do we use to measure velocity or acceleration?

Motion Tracker

300

What two things should we do before we start writing a paragraph-length response?

Identify the major topics and brainstorm key points/ideas/equations to include

300

A ballerina is spinning and extends her arms, what happens to her motion?

Her spinning will slow down (angular velocity decreases) because her rotational inertia increased
300

What are the four types of "collisions" and the key point to remember for each?

Inelastic - bounce apart

Elastic - bounce apart, K is conserved

Totally Inelastic - stick together, same final velocity

Recoil - push apart, same initial velocity


300

What is the equation for gravitational field strength near a planet?

g=GM/r^2 

400

When should we use a graph in analyzing the results of a lab?

When we want to evaluate the relationship between two variables.

400

How do you start a derivation?

Identify and write a relevant equation on the reference sheet or a fundamental physics principle.

400
Given the frequency and gravitational acceleration of a pendulum, how can we solve for the length of the pendulum?

Use 

T=1/f

and

T=2pisqrt(l/g)

400

How do the x and y components of a force change as the angle of the force increases?

The x component decreases, the y component increases

400

How do we calculate the average velocity of an oscillator in simple harmonic motion?

v_m=(4A)/T

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