First slide

Angular momentum

Question

The position vector of a particle bis $\vec{r}$ = $[2 i + 3 j + k$ while its linear momentum is $\vec{p} =$ (2i+3j+k). Then its angular momentum about the origin is

Moderate

A

2i-4k
B

4i-8k
C

2i-4j+2k
D

4i-8j

Solution

We know that L = r x P
Here r=4j and p=2i+3j+k
$\begin{array}{l} ∴ L = r \times p = 4 j \times (2 i + 3 j + k) \\ = 4 i - 8 k \end{array}$

Get Instant Solutions

When in doubt download our app. Now available Google Play Store- Doubts App

Recieve an sms with download link

Doubts App

OR

SCAN ME

Doubts App

Doubts App