Question

an angle between vector p and r is measure of 120.if p magnitude is equal to 8 and r magnitude is also 8 then calculate p(p-r)​

Answer 1

Given:

An angle between vector p and r is measure of 120. The p magnitude is equal to 8 and r magnitude is also 8.

To find:

Calculate p (p - r)

Solution:

From the given information, we have the data as follows.

An angle between vector p and r is measure of 120. The p magnitude is equal to 8 and r magnitude is also 8.

We are asked to compute the value of p (p - r).

Consider the given equation.

p × (p - r)

= (p × p) - (p × r)

= 0 - (p × r)

= - |p| · |r| · sin θ

= - (8 × 8 × sin 120°)

= - 64 × √3/2

= - 32 × √3

= - 32√3

Therefore, the value of p (p - r) is - 32√3

Answer 2

Answer:

52

Step-by-step explanation:

51 * root value of 3

51 * 1.731

52