Question

Which of the following is an accurate statement about vectors?

A. Rotating a vector about an axis is passing through the tip of the vector does not change the vector
B. The magnitude of a vector can be zero even if one of its components is not zero
C.If two vectors have unequal magnitudes it is possible that their vector sum is zero
D. It is possible to add a scalar quantity to a vector
E. The magnitude of a vecotr may be positive even if all of its components are negative

Answer 1

Which of the following is a vector quantity?

A. displacement
B. mass
C. temp
D. luminosity

Answer 2

What are the components of a vector with a magnitude of 4.00 and a direction of -112 degrees?

A. (1.50, 3.71)
B. (-1.50, -3.71)
C. (-3.71, -1.50)
D. (-1.12, -1.78)

Answer 3

Vector A is described as having magnitude 5 and angle -20 degrees. Which is equivalent statement of magnitude and angle of vector A?

A. Magnitude 5; angle 20
B. magnitude -5; angle 20
C. magnitude 5; angle 160
D. magnitude -5; angle 160
E. magnitude 5; angle 70

Answer 4

A projectile is fired from the origin (at y = 0 m) as shown in the diagram. The initial velocity components are V0x=310m/s and V0y=26m/s The projectile reaches maximum height at point P, then it falls and strikes the ground at point Q, which is 20 m below the launch point. What is the horizontal distance that the projectile travels (labeled x in the diagram)?


700 m

3.2 km

870 m

1.3 km

1.9 km