Dynamics - Planar Rigid Body

If a rigid body is in translation only, the velocity at points A and B on the rigid body 

• are usually different
• are always the same
• depend on their position
• depend on their relative position

If a rigid body is rotating with a constant angular velocity about a fixed axis, the velocity vector at  point P is 

• ω x r_p
• r_p x ω
• dr_p/dt
• All are correct

A disk is rotating at 4 rad/s in clockwise (CW) direction. If  it is subjected to a constant angular acceleration of 2 rad/s², determine the acceleration at B

• (4 i + 32 j) m/s²     
• (4 i - 32 j) m/s²
• (- 4 i + 32 j) m/s²   
• (- 4 i -32 j) m/s² 

A Frisbee is thrown and curves to the right.  It is experiencing 

• rectilinear translation
• curvilinear translation
• pure rotation
• general plane motion

A body subjected to general plane motion undergoes a/an

• translation.
• rotation
• simultaneous translation and rotation
• out-of-plane movement

In general plane motion, if the rigid body is represented by a slab, the slab rotates

• about an axis perpendicular to the plane
• about an axis parallel to the plane
• about an axis lying in the plane
• All are incorrect

The figure shows velocity equation in cylindrical components. If radial line (r) is constant, which term represents the tangential velocity?

• A
• B
• None
• All

The figure shows acceleration equation in cylindrical components. If radial line (r) is constant, which term represents the tangential acceleration?

• A
• B
• C
• D

The figure shows acceleration equation in cylindrical components. If radial line (r) is constant, which term represents the normal acceleration?

• A
• B
• C
• D