Question

A helium atom is moving with the velocity v of 201 - 15j m/s (where i and j are unit vectors). What is its
speed?
Select one:
On
O a. 5 m/s
b. 15 m/s
O c. 25 m/s
d. 35 m/s​

Answer 1

Answer:

c) 25m/s

Step-by-step explanation:

resultant vectors magnitude is given by

$\sqrt{a^{2} + b^{2} }$

This will give

$\sqrt{625 } = 25$