Question

6.
The position vector of a particle Ř as a function
of time is given by R=4 sin (2nt)i + 4 cos(2īt)j,
where R is in meters, t is in seconds and i andj
denote unit vectors along x-and y-directions,
respectively. Which one of the following statements
is wrong for the motion of particle?
[Re-AIPMT-2015]
(1) Path of the particle is a circle of radius 4 m
(2) Acceleration vector is along -R​

Answer 1

Answer:(1)

Explanation:bcz the second option is correct

When u differentiate this twice u will get acceleration vector which is along -R vector.