Totally "Rad"
We measure change in circular position (displacement) using these units
What are radians?
What is the name of the rule used to determine direction of a rotational vector?
What is right hand rule?
What is the positive direction for torque?
What is counter clockwise?
What two things can change to make moment of inertia change?
What are mass and radius?
How many Radians are in one Rotation?
What is 2pi?
1 Radian is defined as when the ________________ and ___________________ equal each other.
What are arc length and radius?
What will a sliding box go down a ramp faster than a spinning wheel?
What is because some of the GPE is converted to omega instead of v for the wheel?
What two forces create no torque?
What are ones applied at r=0 and parallel forces?
________________________ is what resists an object’s change in rotation
What is moment of inertia?
This is what we call the imaginary force that we feel away from the center of rotation.
What is centrifugal?
5 Rotations around a circle can be better described in _________________ Rad
What are 10pi radians?
When is angular momentum not conserved?
What is when an external Torque is applied?
Will a force applied at the doorknob produce more or less torque than a force applied at the center of the door?
What is more than?
Name the three types of acceleration in one spinney things problem
What are angular accel, tangential accel., and centripetal accel.?
If we only can apply a limited amount of force, this should be increased to increase the torque.
What is radius
What 3 variables are not changed no matter where on a spinning wheel you are (I.e. no matter what radius)
What are angular displacement, velocity, and acceleration?
A figure skater’s moment of inertia is about 22 kgm2 when her arms are fully extended and she is rotating with an angular velocity of 13 rad/s. If she pulls her arms in and changes her moment of Inertia to 8 kg m2, what will her angular velocity be?
What is 35.75 rad/s?
T
What is a screw?
A ring, a disk, and a solid ball having equal masses roll down a hill at the same time. Which reaches the bottom first?
What is the ball?
What is frequency? What is Period?
What is cycles/ 1 second % time/ 1 cycle?
112 RPM = ________________ rad/s
What is 11.73 radians per second?
Judy kicks a beach ball and makes it roll at 4 m/s. The ball has a mass of 0.5 kg and a radius of 1.3 m. Find the Total kinetic energy of the ball.
What is 6.665 J?
We apply a force of 10N perpendicular to the head of a bolt using a 15cm wrench. What is the torque on the bolt?
What is 1.5Nm?
A slender rod that is 16 m long and weighs 4 kg is being spun around its end. What is the moment of inertia for the rod?
What is 341.3 kgm2?
If we want to give a circular space station (r = 540m) artificial gravity (centripetal acceleration) equal to that on Earth, with what linear velocity must we spin the ship to achieve this?
What is 72.75m/s ?