Two with size and direction are called vectors. Two with size and no direction are called scalars. What is the length? What is the force? The blank line is short Two vectors with magnitude and direction are called vectors with magnitude and no direction are called scalars. What is the length? What is the force? Empty question line is very short

Two with size and direction are called vectors. Two with size and no direction are called scalars. What is the length? What is the force? The blank line is short Two vectors with magnitude and direction are called vectors with magnitude and no direction are called scalars. What is the length? What is the force? Empty question line is very short

Scalar
Scalar
Vector
Vector

Scalar quantity
Scalar quantity
Vector
Vector

Why is the speed heading? (I know that speed, like force, has magnitude and direction and is a vector) Is the tangent direction of the object's velocity (straight line is the object's direction of motion, curve is the tangent direction But the tangents have two ends... Do you think the object is moving in the same direction? Why is the speed heading? (I know that speed, like force, has magnitude and direction and is a vector) Is the tangent direction of the velocity of the object (straight line is the direction of motion of the object, curve is the tangent direction But the tangents have two ends... Do you think the object is moving in the same direction?

Why there is direction, because size alone can not represent all the information of motion.
For example, if the object moving 5m/s southward is changed to 5m/s northward, the velocity will not change, but the acceleration is still required.
In that direction of motion of the object

Why vector addition and subtraction follow parallelogram rule Why vector addition and subtraction follows parallelogram rule

This is a coordinate problem, and it would be easier to understand if you learned the plane Cartesian coordinate system
Let two vectors a=(x1, y1), b=(x2, y2)
Their sum is (x1+x2, y1+y2), which in the coordinate system is just the diagonal of a parallelogram with a, b adjacent sides, so it follows the parallelogram rule

This is a coordinate problem, and it would be easier to understand if you learned the plane Cartesian coordinate system
Let two vectors a=(x1, y1), b=(x2, y2)
Their sum is (x1+x2, y1+y2), which, in the coordinate system, is just the diagonal of a parallelogram with a, b, so it follows the parallelogram rule

Judgement Method of Vector Triangle Rule and Quadrilateral Rule Addition and Subtraction How to judge when to add or subtract, and how to judge when to add or subtract the fourth side to the sum of the other three sides Judgement Method of Vector Triangle Rule and Quadrilateral Rule Addition and Subtraction The triangle rule sometimes equals vector a plus vector b, and sometimes equals their difference, how to judge when to add or subtract, and the parallelogram rule how to judge when the fourth side equals the sum of the other three sides

0

Are the two vectors perpendicular and, in the case of only perpendicular, multiplied by zero

Are the two vectors perpendicular and only perpendicular to each other?

Given that the length of the diagonal AB of the right triangle ABC is equal to √29, calculate the vector AB * vector AC + vector BC * vector BA + vector CA * vector CB

Vector AB * Vector AC + Vector BC * Vector BA + Vector CA * Vector CB
= To AB* to AC+ to CB* to AB+ to CA* to CB
= To AB*(to AC+to CB)+0
= To AB * to AB
=|AB |^2
=29

Vector AB * Vector AC + Vector BC * Vector BA + Vector CA * Vector CB
= To AB* to AC+ to CB* to AB+ to CA* to CB
= To AB*(to AC + to CB)+0
= To AB * to AB
=|AB |^2
=29