Question

state the condition when on applying force the body has(a)translational motion (b)rotational motion.

Answer 1

Translational motion- Translational motion is the motion by which a body shifts from one point in space to another. One example of translational motion is the the motion of a bullet fired from a gun.

Rotational motion- Rotation around a fixed axis or about a fixed axis of revolution or motion with respect to a fixed axis of rotation is a special case of rotational motion. The fixed axis hypothesis excludes the possibility of an axis changing its orientation, and cannot describe such phenomena as wobbling or precession. 

Answer 2

Answer:

(a) If a rigid body is free to move, the applied force will cause translational motion.

(b) If a rigid body is pivoted, the applied force (if its moment is non-zero) will cause rotational motion.

Explanation:

Translational Motion:- If an object is undergoing translator motion, we can note that there is no change in the orientation of the object. Translator motion is also known as translational motion. A body is said to be under a perfect translator motion when the object moves such that all the particles in the object move parallel to each other.

Example:-Man walking, Car or bus moving.

Rotational Motion:- It can be defined as a motion of an object around a circular path, in a fixed orbit. It is also be defined as the motion of a body, in which all of its particles move in a circular motion with a common angular velocity, about a fixed point.

Example:- The rotation of Earth about its axis.

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