Gravitational Potential Energy GPE = mgh where the acceleration of gravity g = 980 cm/s²
Kinetic Energy KE = ½mѵ²
momentum p = mass m × velocity ѵ
When a RipStik rolls down hill...
☐ The RipStik rolls at a constant rate of speed.
☐ The RipStik rolls less than twice as fast from twice as high.
☐ The RipStik rolls twice as fast from twice as high.
☐ The RipStik rolls more than twice as fast from twice as high.
The chart below has three height versus distance functions plotted, each labelled by a letter: A, B, or C. Match the function by letter to the description below.
___ With increasing height, the velocity increases at an increasing rate.
___ With increasing height, the velocity increases at a constant rate.
___ With increasing height, the velocity increases at a decreasing rate.
___ Which of these functions depicts what really happened on Monday: A, B, or C?
My Corona EXiV car has a mass of 1150 kg. Driving at the state speed limit of 11.1 m/s (that is forty kilometers per hour), calculate the following:
__________ __________ ...the momentum p of the car.
__________ __________ ...the kinetic energy KE of the car.
A marble with a mass of 5.0 grams is 40 centimeters above a table on a banana leaf marble ramp. The marble is released and rolls down the ramp onto the table. Use an acceleration of gravity g equal to 980 cm/s² for this question.
__________ __________ Calculate the Gravitational Potential Energy of the marble before the marble is released.
__________ __________ Determine the Kinetic Energy that the marble should have at the bottom of the ramp.
__________ __________ Calculate the velocity that the marble should have at the bottom of the ramp.
__________ In the laboratory using an actual marble and banana leaf, will the marble have the speed you just calculated?
__________ Will the actual marble be fasterORslower?
Why?
A student rolled marbles into a line of five marbles.
_________ If one marble collides with a line of five marbles on a ruler track, how many marbles are ejected (go out)?
_________ If three marbles collide with a line of five marbles on a ruler track, how many marbles are ejected (go out)?
___________________ If one marble moving very fast collides with a line of five marbles on a ruler track, what is the speed of the ejected marble(s)?
Explain why you think the marbles know what to do.