5 Written Questions
5 Matching Questions
- Rotational inertia (often called moment of inertia)
- Formula for Centripetal Force
- Stick about CG:
- centrifugal force
- a Apparent outward force on a rotating or revolving body.
- b I = 1/12 mL²
- c The property of an object that measures its resistance to any change in its state of rotation: if at rest, the body tends to remain at rest; if rotating, it tends to remain rotating and will continue to do so unless acted upon by a external net torque.
- d F = ma = m(v^2/r)
where m = mass, a = centripetal acceleration, v = velocity, r = radius
- e The state of an object in which it is not acted upon by a net force or a net torque.
5 Multiple Choice Questions
- ...(∑T = 0, where T stands for torque). Anything in mechanical equilibrium doesn't accelerate--neither linearly nor rotationally.
- The linear speed tangent to a curved path, such as in circular motion.
- Product of force & the time interval during which the force acts. Impulse produces change in momentum Ft= change(mv)
- That which that can be change the condition of matter. Comonly defined as the ability to do work; actually only describable by examples. It is not a materail substance.
- The average position of the mass of an object. The CM moves as if all the external forces acted at this point.
5 True/False Questions
Linear Speed (translational speed) → the speed with which an object moves through an angle for every unit of time; units: RPM (revolutions per minute), rad/s, θ/s
Solid cylinder: → The state of an object in which it is not acted upon by a net force or a net torque.
For the case of an object that is small compared with the radial distance to its axis of rotation, such as a tin can swinging from a long string or a planet orbiting in a circle around the Sun, the angular momentum can be expressed as the magnitude of its linear momentum, *mv*, multiplied by the radial distance, *r*. In shorthand notation: → It is common to express totational rates in revolutions per minute (RPM).
Linear momentum = mass × velocity → The average position of the mass of an object. The CM moves as if all the external forces acted at this point.
work → Product of force or lever arm distance, which tends to produce rotational accelertion.