5 Written Questions
5 Matching Questions
- Centripetal Acceleration
- rotational speed
- centrifugal force
- Formula for Centripetal Acceleration
- a Apparent outward force on a rotating or revolving body.
- b Newton's First Law states that a body in motion stays in motion at a constant speed and in a straight line unless acted upon by a net force; therefore, a force must be pulling inward on an object moving in a circular path in order to prevent it from moving in a straight path.
- c Number of rotations or revolutions per unit of time.
- d In a machine, the ratio of useful energy output to total energy input, or the percentage of work input that is converted to work output.
- e a = v^2/r = 4rπ^2/T
where v = velocity, r = radius, T = period
5 Multiple Choice Questions
- Work done on an object is equal to the kinetic energy gained by the object. work = change in energy or W = change(KE)
- It is common to express totational rates in revolutions per minute (RPM).
- I = mr²
- This force is not an actual force; it is a fictitious force that seems to pull outwards on an object on a circular path. This effect is due to inertia, or the tendency for a moving object to follow a straight path.
- The product of force and lever-arm distance, which tends to produce rotation.
Torque = lever arm × force
5 True/False Questions
axis (pl. axes) → I = ½ mr²
Formula for Torque → motion with constant radius of curvature caused by acceleration being perpendicular to velocity
*revolution* → Spinning motion that occurs when an object rotates about an axis located within the object (usually an axis through its center of mass).
Hoop about diameter: → I = 1/3 mL²
potential energy → Energy of position, usually related to the relative position of 2 things, such as a stone and the earth, or an electron and a nucleus.