You place a penny on a turntable at a distance of 14.3 cm from the center. the coefficient of static friction between the penny and the turntable is 0.400. the turntable's angular acceleration is 2.45 rad/s². how long after you turn on the turntable will the penny begin to slide off of the turntable? [note: assume the tangential component of friction is sufficiently small and can be ignored.]

Mass (kg) force (n) 5 25 10 50 15 75 20 100 a student was trying to find the relationship between mass and force. he placed four different masses on a table and pulled them using a spring scale. the table shows the different masses used in the experiment and the force required to pull each mass. the student concluded that more force was required to pull heavier objects. what comment would you make regarding his conclusion? a) no clear relation can be observed between mass and force from the data. b) there is a direct proportion between the mass and force listed in the table. c) gravity should have been taken into account while performing the experiment. d) there is an inverse proportion between the mass and force listed in the table.

The ability to make things happen is also called a. heat b. force c. matter d. energy

What energy transformations occur each time the skateboarder rolls up the ramp?