math-acceleration Quiz

A ___ is a quantity that had magnitude, but no direction.

• Scalar

• Particle model

• Motion diagram

• Vector

Significant Figures: What is the product of 12.56 and 2.12 expressed to the correct number of significant figures?

• 27

• 26.6

• 26.62

• 26.627

Solve F=ma for a.

• a=m/F

• a=F/m

• a=f - m

• a=Fm

Write the number 0.853 in scientific notation.

• 0.853x10^0

• 85.3 x10^-2

• 8.53 x 10^-1

• 8.53 x10^1

The number 4.2x10^2 in standard notation is:

• 420

• 0.42

• 0.042

• 0.0042

A conversion factor is a ratio of ________ measures.

• opposite

• larger

• smaller

• equivalent

The units for speed are:

• m/s

• km/s

• m/s^2

• m^2/s

If a car is traveling with a velocity of 20 m/s, how long will it take to reach 4000m?

• 200 m

• 200 s

• 0.005 s

• 80000 s

A hiker walks 3 km north, 4 km east, 5 km south, and 4 km west. The magnitude of the resultant displacement of the hiker is:

• 2 km

• 3 km

• 5 km

• 16 km

• none of these is correct

If a car accelerates uniformly from rest to 15 meters per second over a distance of 100 meters, in 13.6 seconds, the magnitude of the car’s acceleration is:

• 0.15 m/s^2

• 1.1 m/s^2

• 2.3 m/s^2

• 6.7 m/s^2