Two-dimensional Kinematics

10 Questions | By Mcdonellm1 | Last updated: Jan 29, 2013 | Total Attempts: 1914

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You may take this quiz up to 3 times. The quiz is open through Sunday, September 11th. (Some questions are review questions, some are new!)

Questions and Answers

1.

Change in position is called ____________.
- A.
  
  Velocity
- B.
  
  Displacement
- C.
  
  Rate
2.

The change of velocity over time is called ___________.
- A.
  
  Acceleration
- B.
  
  Speed
- C.
  
  Distance
3.

An object in free-fall is undergoing __________ acceleration.
- A.
  
  Constant
- B.
  
  Average
- C.
  
  Instantaneous
4.

The acceleration due to gravity at or near the earth's surface is ______ m/s².
- A.
  
  3.5
- B.
  
  27
- C.
  
  9.8
5.

Displacement in 2-dimensions is a ___________, because you must know both magnitude and direction.
- A.
  
  Scalar
- B.
  
  Vector
- C.
  
  Number
- D.
  
  Straight line
6.

A vector in 2-dimensions can be broken down into horizontal and vertical ___________ vectors.
- A.
  
  Component
- B.
  
  Scalar
- C.
  
  Uneven
- D.
  
  Equivalent
7.

What is the vertical component of velocity of an object moving at 5 m/s at an angle of 30 degrees above the ground?
- A.
  
  5 sin 30 m/s
- B.
  
  5 cos 30 m/s
- C.
  
  30 cos 5 m/s
- D.
  
  30 sin 5 m/s
8.

If we ignore air resistance, we usually say that the horizontal component of acceleration of a projectile is ___________.
- A.
  
  Variable
- B.
  
  Equal to the vertical component of acceleration
- C.
  
  Constant
- D.
  
  0
9.

If we ignore air resistance, the vertical component of acceleration of a projectile is _________________.
- A.
  
  -9.8 m/s^2
- B.
  
  0
- C.
  
  Variable
- D.
  
  Constantly increasing
10.

If your initial velocity does not change, which launch angle will result in the greatest horizontal displacement of a projectile?
- A.
  
  0 degrees
- B.
  
  30 degrees
- C.
  
  45 degrees
- D.
  
  90 degrees (straight up)