Question

In a projectile motion the velocity:
A) Is always perpendicular to acceleration
B) Is perpendicular to acceleration for half journey only
C) Is never perpendicular to acceleration
D) Is Perpendicular to acceleration at one instant only​

Answer 1

⭐《ANSWER》

$\huge\mathfrak{\underline {\underline\pink {ANSWER}}}$

↪Actually welcome to the concept of the PROJECTILE MOTION

↪since we know that , the Projectile motion has a parabolic TRAJECTORY,

↪So we can get a tangent at every point by differentiating the curve ,

↪When the projectile is launched , there are two components of velocity that is ,

〽==》 Ucos@ and Usin@ ,

↪from these , the Ucos component is always parallel to the Horizontal range of the motion , but we know that here ,

↪The Acceleration due to gravity is always acting towards the centre of the earth , thus we can say that it is perpendicular to the Horizontal component of the velocity,

↪⭐Thus , Veloctiy is Always perpendicular to the Acceleration .

Answer 2

Answer :-

Option D.

Information :-

In a projectile motion the velocity IS Perpendicular to acceleration at one instant only.

In general the velocity has two components, horizontal and vertical. Acceleration is vertical. So there is always some angle between them. But at the top most point of flight, the velocity is horizontal and acceleration is vertical.

Hope it Helps !!!!