Dynamics Revision Quiz

If a particle moves along a curve with a constant speed, then its tangential component of acceleration is

• positive

• negative

• zero

• constant

The downward acceleration of an object in free-flight motion is

• zero

• increasing with time

• 9.81 m/s2

• decreasing with time

The directions of the tangential acceleration and velocity are always

• perpendicular to each other

• collinear

• in the same direction

• in opposite directions

In curvilinear motion, the direction of the instantaneous velocity is always

• tangent to the hodograph

• perpendicular to the hodograph

• tangent to the path

• perpendicular to the path

In curvilinear motion, the direction of the instantaneous acceleration is always

• tangent to the hodograph

• perpendicular to the hodograph

• tangent to the path

• perpendicular to the path

The slope of a v-t graph at any instant represents instantaneous

• velocity

• acceleration

• position

• jerk

____ is a study of the geometry of the motion

• kinematics

• kinetics

____ is a study of the forces that cause the motion

• kinematics

• kinetics

Displacement of a particle over a given time interval equals the area under the ___ graph during that time.

• a-t

• a-s

• v-t

• s-t

The downward acceleration of an object in free-flight motion is

• zero

• increasing with time

• 9.81 m/s2

• decreasing with time