Physics

Which of the following could be measured using the units of 'seconds'?

• time

• speed

• distance

• velocity

Which kinematic equation below will solve the following problem: At 8:10am, a 45 pound sailboat on Presque Isle Bay had an initial velocity of 1.2 ft/sec west. It began to accelerate west at the rate of 0.20 ft/sec^2. How much time was required to obtain a velocity of 9.0 ft/sec west?

• Δx = 0.5(vi+vf) Δt

• vf = vi + a(Δt)

• Δx = Vi (Δt) + 0.5a(Δt)^2

• vf^2 = vi^2 + 2a(Δx)

How many significant figures are in the measurement 0.201 meters?

• 2

• 3

• 4

• 5

During rotational motion, objects spin around an ___.

• amplitude

• axis

• acceleration

• apex

What is the letter abbreviation for x10^-3?

• µ

• m

• k

• c

What is the metric unit of 'force'?

• pound

• Newton

• kilogram

• second

If an object is launched horizontally, its initial vertical velocity (Vyi) is

• -9.80 m/sec^2

• zero

• same as Vxi

• 9.80 m/sec^2

Without friction (or in a vacuum), which would fall to the ground with a greater acceleration: a leaf or a stone?

• The Leaf

• The Stone

• Both accelerate at the same rate.

• It is difficult to determine without more information.

Of the following, which could be units of arc length?

• radians

• degrees

• seconds

• meters

The gravitational force the moon feels from the Earth is equal in ___ but opposite in ___ to the gravitational force the Earth feels from the moon.

• direction, magnitude

• inertia, momentum

• magnitude, direction

• price, cost