WorksheetsPhysics U1 Review
Total questions: 15
Worksheet time: 15mins
What two things must a scientific question include?
independent and dependent variables
control and independent variables
dependent and control variables
experimental and independent variables
What is a controlled variable in a lab investigation?
a variable that is changed by the one conducting the investigation to determine its effect on another variable
a variable whose response is measured during the investigation
a variable kept constant since it's not the focus of the investigation
What is the process for converting centimeters to meters?
divide by 1000
divide by 100
multiply by 100
multiply by 10
What is an independent variable in a lab investigation?
a variable that is changed by the one conducting the investigation to determine its effect on another variable
a variable whose response is measured during the investigation
a variable kept constant since it's not the focus of the investigation
What is velocity?
The change of position
The rate of change of force over time
The rate of change of speed over time
The rate of change of position over time
What is the normal force?
the force of gravity pulling on an object
the sum of all forces acting on an object
the force of a surface preventing an object from passing through the surface
What does it mean for an object to be in equilibrium? (select ALL that apply!!)
net force of 0 N
acceleration of 0 m/s^2
velocity of 0 m/s
constant velocity
What does it mean for two variables to be INVERSELY proportional?
they change by reciprocal factors - if one increases, the other decreases by the same factor
they change by the same factor - if one increases, the other increases by the same factor
Which equation do we use to relate net force and acceleration?
Fg = mg
a = Fnet/m
Fnet = Fup - Fdown
xf = xo + vot + (1/2)at2
Which equation would you use for the following problem?
A car starts at rest and accelerates at a rate of 3 m/s2. What is the position of the car after 5 seconds?
Fg = mg
a = Fnet/m
Fnet = Fup - Fdown
xf = xo + vot + (1/2)at2
Which equation do we use when a problem involves multiple vertical forces?
Fg = mg
a = Fnet/m
Fnet = Fup - Fdown
xf = xo + vot + (1/2)at2
What equation do we use to calculate the force of gravity on a mass?
Fg = mg
a = Fnet/m
Fnet = Fup - Fdown
xf = xo + vot + (1/2)at2
How do we know if an object is accelerating from a position-time graph?
the position-time graph is a straight line
the position-time graph is curved
the position-time graph is a horizontal line
the position-time graph is a vertical line
Which THREE things are true for a properly drawn free-body diagram?
arrows pointing away from the dot/box
labels for the force on each arrow
representing greater forces with longer arrows
always has four arrows
A rope is used to pull up a 2 kg box with an acceleration of 5 m/s2. What is a possible value for the upwards force of the rope on the box?
10 N
15 N
20 N
25 N
