







An egg falls from rest 
20180510 

Amy pose la question : An egg falls from rest a distance of 75cm to the floor.
Neglecting air resistance, at what speed does it hit the floor? Penny Nom lui répond. 





Speed and velocity 
20160214 

kechi pose la question : A boat sails south through Chesapeake Bay. It takes 10 hours to sail 110 kilometers. Describe the boat's motion. Calculate the boat's speed and velocity, showing the calculations. Explain how the boat's speed is different from its velocity Penny Nom lui répond. 





Time with NonUniform Motion 
20080721 

jenina pose la question : An unmarked police car, travelling a constant 95km/h, is passed by a speeder travelling 145km/h. precisely 1.00s after the speed passes, the policeman steps on the accelerator. If the police car’s acceleration is 2.00m/s², how much time elapses after the police car is passed until it overtakes the speeder (assumed moving at constant speed)? Janice Cotcher lui répond. 





The swaying of a building in the wind 
20070811 

San pose la question : During a strong wind, a tall builing, such as the CN Tower, can sway
back and forth as much as 100cm, with a period of 10 seconds.
Please help me to determine the equation for this function, in the form
y=asinkx Stephen La Rocque lui répond. 





Projectile motion equations 
20070612 

Dillon pose la question : Ron throws a ball straight up with an initial speed of 60 feet per second from a height of 5 feet. Find parametric equations that describe the motion of the ball as a function of time. How long is the ball in the air? When is the ball at its maximum height? What is the maximum height of the ball? Stephen La Rocque lui répond. 





Regular and irregular shapes 
19991003 

Samuel Tighe pose la question : What is the difference between a regular shape and an irregular shape? Are a rectangle and a triangle regular or irregular shapes? Walter Whiteley lui répond. 





Shapepreserving transformations 
19990504 

J McAndrew pose la question : A shape preserves its shape if a rotation, translation or scaling is performed on it. Are these the only continuous transformations which have this property? These transformations if performed on the parts and then summed have the same effect as the transformation being applied to the whole; are these linear transformations? Who, and what area of mathematics has classified all transformations of this type completely? Chris Fisher lui répond. 

