Graphs
What is represented by the slope of a displacement vs. time graph?
Velocity
What is the value of free fall acceleration near the Earth's surface?
-9.8 m/s2
Is density a scalar or vector?
Scalar
What's the SI unit of velocity?
m/s
What's the path length travelled by an object?
Distance
What's represented by the slope of a velocity vs. time graph?
Acceleration.
What's the description of the acceleration represented by a ditance-time graph with a constant slope of +5 units?
Zero.
Is force a vector or scalar?
Vector
What is change in position divided by time?
Average velocity.
What is a vector quantity?
A quantity with both magnitude and direction.
What's the description of the speed represented by a straight line, parallel to the x-axis in a distance vs. time graph?
Zero
What's the sign representing the acceleration of a car that is increasing its velocity in the negative direction?
Negative
Is gravitational field strength a vector or scalar?
Vector
What is the the average velocity of snowboarding Xi when she travels 50 meters to the right and then 20 meters to the left in 10 minutes
3 meter/minute.
I drive 120 miles in my car round trip from my house to school and back. It takes me two hours to drive this distance. What is my average velocity for this trip?
Zero.
What's represented by the area under a velocity vs. time graph?
Displacement
What's negative acceleration
Deceleration
Is electric field strength a scalar or vector?
Vector.
A lightning bug flies at a velocity of 0.75 m/s due east. A light breeze from the east blows the bug at a velocity of 0.75 m/s. What is the resultant velocity of the lightning bug?
0 m/s
World famous Shanghainese Physicist in the field of particle and nuclear physics. She worked on the Manhattan project.
Chien-Shiung Wu
What's represented by the area under an acceleration-time graph?
Change in velocity
What's the average acceleration of Lucas when he jumps onto a slippery tile floor with a velocity of 10 m/s and skids to a full stop 2 seconds later?
-5 m/s2
Is elastic potential energy a scalar or vector?
Scalar
A ball is thrown up at an initial velocity of 20m/s. What is its velocity after 4 seconds? Ignore air resistance and use g=-9.8m/s2.
-19.2m/s
What was the destination of the Shenzhou 18?
Tiangong Space Station