A certain particle undergoes erratic motion. At every point in its motion, the direction of the particle's momentum is always
the same as the direction of its velocity
the same as the direction of its acceleration
the same as the direction of its net force
the same as the direction of its kinetic energy

Question

A certain particle undergoes erratic motion. At every point in its motion, the direction of the particle's momentum is always
the same as the direction of its velocity
the same as the direction of its acceleration
the same as the direction of its net force
the same as the direction of its kinetic energy

Toppr Admin · Accepted Answer

Linear momentum -x2192-P- of a body of mass m and velocity -x2192-v is expressed as- -xA0-x2192-P-m-x2192-v-xA0-Since- -x2192-P is a vector quantity and its direction is defined by the direction of -x2192-v- it always has the same direction as -x2192-v-

(1)	Its momentum changes but the kinetic energy remains constant.
(2)	Its momentum and kinetic energy both changes.
(3)	Its momentum and kinetic energy both remains constant.
(4)	Its kinetic energy changes but the momentum remains constant.

Linear momentum (→P) of a body of mass m and velocity →v is expressed as: →P=m→v. Since, →P is a vector quantity and its direction is defined by the direction of →v, it always has the same direction as →v.

Linear momentum ( $\to P$ ) of a body of mass m and velocity $\to v$ is expressed as: $\to P = m \to v$ .
Since, $\to P$ is a vector quantity and its direction is defined by the direction of $\to v$ , it always has the same direction as $\to v$ .