أسئلة في الفيزياء

Two equal and parallel vectors have a dot product of 36 units. What is their cross product?

• Zero

• 90 units

• 6 units

• 36 units

If vector A = 4 units to the east and vector B = 5 units to the west, what is the value of 2A - B?

• 13 units to the west

• 3 units to the west

• 13 units to the east

• 3 units to the east

Two equal vectors with an angle of 120 degrees between them have a resultant of 6 units. What is the magnitude of each vector?

• 6 units

• 12 units

• 36 units

• 3 units

What is the maximum vertical height reached by a ball thrown with a speed of 4.5 m/s at an angle of 66 degrees?

• 0.82

• 0.84

• 0.8

• 0.88

What is the angle in degrees between two vectors for their resultant to be minimized?

• 0

• 90

• 180

• 45

Define frictional force and horizontal range.

Why does a chicken move its head forward and backward while walking?

Based on the data shown in the adjacent figure, calculate: 1- What does point A represent and what is its value? 2- What does point B represent and what is its value? 3- Calculate the maximum height reached by the body. 4- What is the value of VY in the figure?

Given two vectors A and B where A is three times B, and their dot product is 240 and their cross product is 180 units, find: 1- The magnitude of each vector 2- A + B