Question

a body travelling in a straight line is said to be acceleration if the angle between its acceleration vector and velocity vector is?

Answer 1

Answer:

90°

Explanation:

Velocity of particle describing uniform circular motion is always perpendicular to the centripetal acceleration of the particle as shown in the figure. Tangential acceleration of the particle is zero and thus centripetal acceleration is the only acceleration of the particle which always acts towards the center of the circular path.

Thus angle between velocity and acceleration of the particle describing uniform circular motion is 90

o

.