Physics
Math
Fluids
Structures
Brain Teasers
100

What is Newton’s Second Law?

F = ma

100

Convert 90° to radians 

pi/2

100

What is the approximate density of water in SI units?


1,000 kg/m³


100

What is the name of the internal force that tends to cause adjacent sections of a beam to slide past one another?


Shear Force

100

What has an axis but never rotates?


A graph

200

What is the formula for density?

density = mass/volume

200

What is the derivative of ln x

1/x

200

What famous equation relates pressure, velocity, and elevation along a streamline in ideal steady flow?


Bernoulli’s

200

What law states that stress is proportional to strain within the linear elastic range?


Hooke’s Law

200

What can fill an entire room without taking space?

Light

300

If a ball is thrown straight upward, what is its acceleration at the highest point, neglecting air resistance?


9.81 m/s2 downward

300

What is the value of tan(90°)?

undefined 

300

What is the term for fluid flow in smooth, orderly layers?


Laminar Flow

300

What is the moment of inertia of a rectangular cross section about its centroidal horizontal axis?


I = bh3/12

300

A man pushes his car to a hotel and immediately knows he's bankrupt. Why?


He’s playing Monopoly 

400

If the speed of an object doubles, its kinetic energy increases by what factor?

4

K = 1/2mv2

400

What is the magnitude of the cross product of perpendicular vectors with magnitudes 3 and 4?


12

400

A pipe has an area of 2 ft² and an average velocity of 5 ft/s. What is its flow rate?


10 ft3/s

400

What is the total load of a triangular distributed load acting over 10 ft with a maximum intensity of 4 kip/ft?


20 kip

400

What is the only place where today comes before yesterday?


A dictionary 

500

A 5 kg object moving at 10 m/s collides with a stationary 5 kg object in a one-dimensional perfectly elastic collision. What is the first object's final velocity?


0 m/s

500

How many different arrangements can be made from the letters in MATH?


24

500

An object displaces 100 N of water. What is the buoyant force acting on it?


100 N

500

A 2 kip force is applied to a beam. If the force's perpendicular distance from a point doubles, what happens to its moment about that point?


It doubles

500

What word becomes its opposite when you add two letters?


Do | Undo