The position vector of a particle changes with time according to th...

Channel:
PW Solutions
Subscribers:
445,000
Published on ● Video Link: https://www.youtube.com/watch?v=bhIFYmgDnI8


Duration: 1:20
66 views
0

The position vector of a particle changes with time according to the relation \( \vec{r}(t)=15 t^{2} \hat{i}+\left(4-20 t^{2}\right) \hat{j} \). What is
\( \mathrm{P} \) the magnitude of the acceleration at \( t=1 \)

W
(a) 25
[JEE (Main) 2019]
(b) 100
(c) 40
📲PW App Link - https://bit.ly/YTAI_PWAP
🌐PW Website - https://www.pw.live



Other Videos By PW Solutions


2023-02-14A particle moves a distance \( x \) in time \( t \) according to eq...
2023-02-14A train is moving slowly on a straight track with a constant speed ...
2023-02-14Match column-I with column-II and select the P correct option. W \...
2023-02-14A car moves on a circular road describing equal angles about the centre in equal intervals of ti...
2023-02-14The chords of contact of the pair of tangents drawn from each point...
2023-02-14Let a complex number \( z,|z| \neq 1 \), satisfy \( \log _{\frac{1}...
2023-02-14A \( L \) shaped rod whose one rod is horizontal and other vertical is rotating about a vertical...
2023-02-14A boy begins to walk eastward along a street in front of his house ...
2023-02-14A copper wire ab of length \( \ell \), resistance \( r \) and mass ...
2023-02-14Which organelle is surrounded by a double phospholipid bilayer with...
2023-02-14The position vector of a particle changes with time according to th...
2023-02-14The co-ordinates of the middle point of the chord cut off on \( 2 x...
2023-02-14Let \( { }^{n} C_{r} \) denote the binomial coefficient of \( x^{r}...
2023-02-14Protein synthesis in an animal cell occurs: (a) on ribosomes presen...
2023-02-14A particle located at \( x=0 \) at time \( t=0 \), starts moving al...
2023-02-14If \( \alpha, \beta \in \mathrm{R} \) are such that \( 1-2 \mathrm{...
2023-02-14A convex lens of focal length \( 25 \mathrm{~cm} \) and a concave l...
2023-02-14The locus of the mid point of a chord of the circle \( x^{2}+y^{2}=...
2023-02-14A particle moves in a circle of radius \( 20 \mathrm{~cm} \). Its linear speed is given by \( v=...
2023-02-14An object is placed at a distance \( u \) from a converging lens an...
2023-02-14Let \( \left(1+x+2 x^{2}\right)^{20}=a_{0}+a_{1} x+a_{2} x^{2}+\ldo...


Tags:
pw