Question

Kindly explain how to do this question

Answer 1

Explanation:

Hey mate!

Here is your answer:-

12. We know that,

Magnitude of a unit vector is 1

therefore,

√(0.5)²+(0.8)²+c²=1

(0.5)²+(0.8)²+c²=1²

0.25+0.64+c²=1

0.89+c²=1

c²= 0.11

c=√0.11

c=0.33

11.When the car is opposite, the man at least distance, the parcel will reach him when thrown with velocity vp

.

now, sinθ=d vp/vc=10/10√2=1/2

⇒θ=45

Thus, total angle between car and parcel =90+θ=90+45=135

HOPE IT HELPS✌✌