19 Questions

Questions and Answers

- 1.Which of the following is a physical quantity that has a magnitude but no direction?
- A.
Vector

- B.
Frame of reference

- C.
Resultant

- D.
Scalar

- 2.Multiplying or dividing vectors by scalars results in
- A.
Vectors if multiplied or scalars if divided

- B.
Scalars if multiplied scalars

- C.
Scalars

- D.
Vectors

- 3.Identify the following quantities as scalar or vector: the mass of an object, the number of leaves on a tree, wind velocity.
- A.
Vector, scalar, scalar

- B.
Vector, scalar, vector

- C.
Scalar, scalar, vector

- D.
Scalar, vector, vector

- 4.Which of the following is an example of a vector quantity?
- A.
Temperature

- B.
Velocity

- C.
Volume

- D.
Mass

- 5.Which of the following is a physical quantity that has both magnitude and direction?
- A.
Vector

- B.
Scalar

- C.
Frame of reference

- D.
Resultant

- 6.Identify the following quantities as scalar or vector: the speed of a snail, the time it takes to run a mile, the free-fall acceleration
- A.
Vector, scalar, scalar

- B.
Scalar, scalar, vector

- C.
Vector, scalar, vector

- D.
Scalar, vector, vector

- 7.An ant on a picnic table travels 3.0*10^1 cm eastward, then 25 cm northward, and finally 15 cm westward. What is the magnitude of the ant's displacement relative to its original position?
- A.
29 cm

- B.
70 cm

- C.
57 cm

- D.
52 cm

- 8.For the winter, a duck flies 10.0 m/s due south against a gust of wind with a speed of 2.5 m/s. What is the resultant velocity of the duck?
- A.
-7.5 m/s south

- B.
12.5 m/s south

- C.
7.5 m/s south

- D.
-12.5 m/s south

- 9.In a coordinate system, a vector is oriented at angle with respect to the x-axis. The y component of the vector equals the vector's magnitude multiplied by which trigonometric function?
- A.
Tan angle

- B.
Cos angle

- C.
Cot angle

- D.
Sin angle

- 10.In a coordinate system, a vector is oriented at angle with respet to the x-axis. The x component of the vector equals the vector's magnitude multiplied by which trigonometric function?
- A.
Tan angle

- B.
Cos angle

- C.
Cot angle

- D.
Sin angle

- 11.Which of the following is the motion of objects moving in two dimensions under the influence of gravity?
- A.
Vertical velocity

- B.
Horizontal velocity

- C.
Directrix

- D.
Projectile motion

- 12.Which of the following does not exhibit parabolic motion?
- A.
A baseball thrown to home plate

- B.
A frog jumping from land into water

- C.
A flat piece of paper released from a window

- D.
A basketball thrown to a hoop

- 13.What is the path of a projectile (in the absence of friction)?
- A.
A wavy line

- B.
Projectiles do not follow a predictable path.

- C.
A hyperbola

- D.
A parabola

- 14.Which of the following is not an example of projectile motion?
- A.
A volleyball served over a net

- B.
A baseball hit by a bat

- C.
A hot-air balloon drifting toward Earth

- D.
A long jumper in action

- 15.
- A.
A space shuttle orbiting Earth

- B.
A leaf falling from a tree

- C.
A stone thrown into a lake

- D.
A train moving along a flat track

- 16.Which of the following is an example of projectile motion?
- A.
An aluminum can dropped straight down into the recycling bin

- B.
A thrown baseball

- C.
A spaece shuttle being launched

- D.
A jet lifting off a runway

- 17.Which of the following is a coordinate system for specifying the precise location of objects in space?
- A.
Diagram

- B.
X-axis

- C.
Frame of reference

- D.
Y-axis

- 18.A piece of chalk is dropped by a teacher walking at a speed of 1.5 m/s. From the teacher's perspective, the chalk appears fall
- A.
Straight down

- B.
Straight backward

- C.
Straight down and forward

- D.
Straight down and backward

- 19.A passenger on a bus moving east sees a man standing on a curb. From the passenger's perspective, the man appears to
- A.
Move west at a speed that is equal to the bus's speed.

- B.
Move west at a speed that is less than the bus's speed

- C.
Stand still..

- D.
Move east at a speed that is equal to the bus's speed.