Kap 1 – Flashcard

Vector A⃗ , which is shown in the figure, has a magnitude of 10 and a direction angle of 60º. What is the magnitude and direction angle (as measured counterclockwise from the positive x-axis) of −A⃗ /2? A. 5, 240º B. 5, -30º C. -5, -30º D. -5, 60º E. -5, 240º

In the calculation of the area of a rectangle with dimensions of 4.282 m by 0.050 m, which of the following answers has the correct number of significant figures? A. 0.21 m2 B. 0.2 m2 C. 0.2141 m2 D. 0.214 m2

In the study of physics, what distinguishes a scalar from a vector? A. A scalar must always be positive, but vectors can be positive, negative, or zero. B. A scalar is specified with a single number, but a vector is specified using both a magnitude and a direction. C. A scalar is a dimensionless number, while vectors are numbers that have dimensions. D. Nothing—the terms "vector" and "scalar" are different names for the same thing. E. Scalars have both a magnitude and a direction, but vectors have only a magnitude.

The motorcycle engine on a Kawasaki Ninja 1000 has a displacement of 1043 cubic-centimeters (cm3). In order to calculate its engine displacement in cubic-inches (in3) what unit conversion factor would you use to multiply the given displacement? A. 1 in3 / 16.4 cm3 B. 2.54 cm3 / 1 in3 C. 1 in3 / 2.54 cm3 D. 6.45 cm3 / 1 in3

Which of the following equations correctly expresses the relation between vectors A⃗ , B⃗ , and C⃗ shown in the figure? A. A⃗ =B⃗ +C⃗ B. B⃗ =A⃗ +C⃗ C. C⃗ =A⃗ +B⃗ D. A⃗ +B⃗ +C⃗ =0