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23 Nov 2019
1. If a rigid body rotates about its center of gravity, itstranslational kinetic energy is ___________ at all times
a. Equal to its rotational kinetic energy
b. Constant
c. Zero
d. Cannot be determined
2. A disk and a sphere, each of mass (m) and radius (r), arereleased from rest. After 2 full turns, which body has a largerangular velocity? Assume roll without slip.
a. Cannot be determined
b. The two are equal
c. Disk
d. Sphere (the body with the smaller MMI will have a largerangular velocity
3. Kinetic energy due to rotation of the body is defined as
a. 1/2I_g w^2
b. I_G w^2
c. 1/2m_g^2
d. 1/2m_g^2 + 1/2I_gw^2
Please explain each one, thank you.
1. If a rigid body rotates about its center of gravity, itstranslational kinetic energy is ___________ at all times
a. Equal to its rotational kinetic energy
b. Constant
c. Zero
d. Cannot be determined
2. A disk and a sphere, each of mass (m) and radius (r), arereleased from rest. After 2 full turns, which body has a largerangular velocity? Assume roll without slip.
a. Cannot be determined
b. The two are equal
c. Disk
d. Sphere (the body with the smaller MMI will have a largerangular velocity
3. Kinetic energy due to rotation of the body is defined as
a. 1/2I_g w^2
b. I_G w^2
c. 1/2m_g^2
d. 1/2m_g^2 + 1/2I_gw^2
Please explain each one, thank you.
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answer
0
watching
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Nestor RutherfordLv2
10 May 2019