Centripetal acceleration is
a constant vector
a constant scalar
a magnitude changing vector
not a constant vector
Get Answer
Centripetal acceleration,
Where is the speed of an object and is the radius of the circle. It is always directed towards the centre of the circle. Since and are constants for a given uniform circular motions, therefore the magnitude of centripetal acceleration is also constant. However, the direction of centripetal acceleration changes continuously. Therefore, a centripetal acceleration is not a constant vector.
Two stones are moving with same angular speeds in the radii of circular paths and . The ratio of their linear speed is ...X.... Here, refers to
2
3
The direction of the angular velocity vector is along
the tangent to the circular path
the inward radius
the outward radius
the axis of rotation
As linear velocity vector is along the tangent to the circular path and angular velocity vector is perpendicular to , so is along the axis of rotation.
The relative velocity at is given by:
From,
So, both have completed quater circle
Relative velocity,
In uniform circular motion
both velocity and acceleration are constant
acceleration and speed are constant but velocity changes
both acceleration and velocity change
both acceleration and speed are constant
In circular motion with constant speed, acceleration is always inward, its magnitude is constant but direction changes, hence acceleration changes, so does velocity. K.E. is constant.
A body is moving with a constant speed in a circle of radius . Its angular acceleration is
zero
Since the circular motion is uniform, therfore there is no change of angular velocity. Thus angular acceleration is zero.
A stone of mass is tied to a string of length and rotated in a circle with a constant speed , if the string is released the stone flies
radially outward
radially inward
tangentially outward
with an acceleration
In uniform circular motion, the body move with (tangential velocity) & . If then it implies that the body is no longer bound to rotate in circle & so no change in the direction of velocity. Hence it move tangentially to the circle outward with velocity .
Two bodies are moving in concentric orbits of radii and such that their time periods are the same. The ratio of their centripetal accelerations is :
As time periods are same and so
General Knowledge
Academics Question Bank
PHYSICS
CHEMISTRY
BIOLOGY
MATHEMATICS
THE WORLD AROUND US
HISTORY
GEOGRAPHY
CIVICS
ECONOMICS
Physics
How - Why - What
NCERT Books (Class 1-12)
Learn At Your Own Pace... Because, Everyone's Pace of Learning is Different...
A unit of Innovexcel Edu Solution LLP.
SWIFT, RELIABLE & CONVENIENT..
Social Media
Corporate Office : Bharat Impact Building, C-26, Sector - 59, Noida, Uttar Pradesh - 201301, India
Excel With Tutors : A Perfect Tutoring Platform & Repository of Learning Materials. Matches the Best Tutor as Per Your Requirement.
© 2025 | ©Innovexcel Edu Solution LLP. All Rights Reserved.
Technology Partner: Indev Consultancy Pvt Ltd