CBSE Class 11-science Answered
Find a vector of magnitude 18, which is perpendicular to both the vectors 4i^-j^+3^k and -2i^+j^-2k^ . Question no 2.The position of a particle is given by r = 3.0ti^-2.0t*ti^+4.0k^m where t is in seconds and the coefficiants have proper units for r to be in meter. A)find the velocity and acceleration of the particle and B)what is the magnitude and direction of velocity of the particle at t=2.0 sec
Asked by sharmistha.panda | 08 Aug, 2012, 02:20: PM
Expert Answer
1. A vector perpendicular to the given two vectors will be in the direction of their cross product.
the unit vector in the direction of their cross product will be( cross product can be found by using
the method of determinants):
and the required vector will be 18(unit vector) = 18/3(-i+2j+2k)= -6i+12j+12k
2. position of particle: r= (3t i - 2t2 j + 4 k) m
(A) velocity, v = dr/dt = (3 i - 4t j) m/s
acceleration, a = dv/dt = -4 j m/s2
(B) velocity at t=2: v= (3i - 8j) m/s
magnitude: (32+82)1/2= (73)1/2
direction: it makes an angle of tan-1(-8/3) from x axis.
Answered by | 09 Aug, 2012, 07:51: AM
Concept Videos
-
Motion in a Plane
This video explains projectile motion and the path of projectile motion. -
Motion in a Plane
This video explains position vector and displacement, average and instantan... -
About Relative Motion
In this video you will learn about Relative motion. -
Motion in a Plane
This video explains scalars, vectors, position and displacement vectors and... -
Motion in a Plane
This video explains total time of flight, horizontal range and maximum heig...
CBSE 11-science - Physics
Asked by roshnibudhrani88 | 23 Mar, 2024, 05:52: PM
ANSWERED BY EXPERTCBSE 11-science - Physics
Asked by vinitdubey7735 | 14 Mar, 2024, 11:21: AM
ANSWERED BY EXPERTCBSE 11-science - Physics
Asked by shailajakandikatla19 | 18 Jan, 2024, 06:40: PM
ANSWERED BY EXPERTCBSE 11-science - Physics
Asked by dhanshreekansyakar | 09 Jan, 2024, 11:57: AM
ANSWERED BY EXPERTCBSE 11-science - Physics
Asked by banhisikhapanda49 | 07 Nov, 2023, 10:42: PM
ANSWERED BY EXPERTCBSE 11-science - Physics
in a vertical circle of radius r at what point in its path a particle may have tension equal to zero
Asked by momintaufik26 | 13 Oct, 2023, 08:26: PM
ANSWERED BY EXPERTCBSE 11-science - Physics
Asked by anshujaiswalname | 10 Sep, 2023, 01:29: PM
ANSWERED BY EXPERTCBSE 11-science - Physics
Asked by subhashreeojha235 | 20 Jul, 2023, 11:22: AM
ANSWERED BY EXPERTCBSE 11-science - Physics
Asked by preethiprithivi05 | 21 Feb, 2023, 09:28: PM
ANSWERED BY EXPERTCBSE 11-science - Physics
Asked by hy9022075 | 11 Jan, 2023, 05:06: PM
ANSWERED BY EXPERT
