Wildcard 1
Units and Numbers
Velocity
Acceleration
100
Why can’t we see through walls?
We see the photons emitted by electron energy level jumps, not physical objects.
100
What are the base SI units of acceleration?
m/s^2
100
Traveling at 22m/s, how far does a vehicle go in 20s?
440 m
100
Can acceleration be negative?
yes
200
Do you feel your own weight?
No, you feel the force of the world pushing upwards on your feet.
200
What is the mass of Earth (just get it within 10x)?
5.972*10^24 kg
200
What is the velocity of a vehicle that travels 300m in 15s (give the answer in m/s)?
20 m/s
200
What's the acceleration due to gravity on Earth's surface?
g=9.81 m/s^2
300
How far are you from Earth right now?
One radius of Earth, 6378km.
300
Which number is bigger?
10^10 * 10^10 or (10^5)^5
(10^5)^5
300
How long does it take to go 705km if you're traveling at 80 km/h?
8.81s
300
If a rocket accelerates at 30 m/s^2 for 5 minutes, what is it's final velocity?
9000 m/s
400
Where does sound travel faster, in the air or in water?
It’s much faster in water. In air 
, in water 
.
400
What are the base SI units of energy?
kg*m^2/s^2
400
What's the average vertical velocity of a projectile?
0 m/s
400
How long does it take to reach terminal velocity, 52.7 m/s, if you're falling at g=9.81m/s^2?
5.37s
500
Are the atoms in your feet touching the atoms in the floor?
No, they’re separated by about 0.5nm due to electric repulsion.
500
What is the fastest velocity any land vehicle has ever traveled (the land speed record) in units of m/s?
Guess within 10x
341 m/s (762 kmph)
500
Find the average velocity of an object that travels at 20m/s for 10s, stops for 1 minute, then travels in the same direction at 10m/s for another 10s.
3.75 m/s
500
Find the average acceleration of an object that accelerates at 10m/s^2 for 10s, then decelerates at 5 m/s^2 for 5s, before accelerating at 10m/s^2 for another 10s.
7 m/s^2