00:01
Hello, here an action has the following velocity.
00:04
Its velocity v is a vector in that 7 .2i minus 5 .4j times 10 power by 4 meters per second.
00:16
It means that vector v is vx vy vz and here vz is zero.
00:28
Meanwhile the field b is negative 0 .90i plus 0 .64j tesla.
00:37
So this b is bx by zero.
00:42
And we have to find in equation a x component of the force.
00:48
So here that's important that there is electron and it means that we can determine the vector of the force.
00:56
That's a vector product of e vb.
01:00
And here we need to add negative sign because it's an election.
01:04
First let's calculate the product of v and b.
01:08
Let's start with a formula that is vy bz minus by vz times i minus a oh sorry minus v x bz minus v z bx j plus vx by minus vy bx k.
01:59
So now here let's look at the first two terms...