Applications and Cross Product of Vectors

• -23i+7j-k

• 23i+7j-k

• -2i+j-7k

• -3i+7j-k

Tags

CCSS.HSN.VM.A.1

• i+8j+11k

• 8i+10j+11k

• i+10j-1k

• -i+2j+3k

• 11𝑖-13𝑗+3𝑘

• -11𝑖+13𝑗−3𝑘

• 1𝑖+13𝑗−3𝑘

• 11𝑖+13𝑗−3𝑘

• 382𝑖−136𝑗+158𝑘

• −382𝑖+136𝑗+158𝑘

• −382𝑖−136𝑗+158𝑘

• −82𝑖−13𝑗+158𝑘

If   $u\ \cdot v\ =\ 0$ , then  $u\ =\ 0\$  and  $v\ =\ 0$ . 

• True 

• False

Calculate the cross product of <1, -2, 1> and <2, -1,1>

• 5

• 3

• < -1, -1, 3>

• < -1, 1, 3>

Tags

CCSS.HSN.VM.A.1

CCSS.HSN.VM.A.3

The cross products solution is a vector that is orthogonal to both of the cross products components

• True
• False

What force acts in the y direction that causes an object to travel in a parabolic arc?

• Friction
• Gravity
• Tension
• No force acting.

John and Danny, own a strong and stubborn puppy named Dexter. It is so hard to take Dexter for a walk that they devise a scheme to use 2 leashes. If John and Danny pull with forces of 23 lbs and 27 lbs at the angles shown, how hard is Dexter pulling if the puppy holds the children at a standstill?

• 50 lbs

• 47.954 lbs

• 48.073 lbs

• 48.461 lbs

What is the magnitude of the resulting force ?

• 18.727 Newtons

• 20 Newtons

• 4 Newtons

• 8.082 Newtons