Question

A particle is acted upon by a force constant
magnitude, which is
is always
always perpen
perpendiculae to
the velocity of the porticle. The motion of the
poeide takes place in a horizontal plane. Then
it follows that
(A) Its velocity is constant
(B) Its acch is constant.
(c) Its kinetic energy is constant
(0) It's linear momentum is constant.
​

Answer 1

Answer:

c) Its kinetic energy is constant.

Explanation:

When force acts on a body, perpendicular to its velocity, the body will change its direction.

Here, perpendicular force is continuously applied which means that the body keeps changing its direction throughout its motion.

Now since acceleration, velocity and momentum are vector quantities, they can't remain constant as the direction of velocity keeps changing.

Remember, the speed of the body remains constant but not its velocity as velocity is a vector quantity.

Therefore, your answer is Kinetic energy since the speed of the body remains constant throughout its motion.

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