Physics Quiz 02 (Ch 2.1, 2.2, 3.1)

The average acceleration is the ratio of which of the following quantities?

• Δd:Δv

• d:Δt

• v:Δv

• Δv:Δt

The speed of a car will increase if the car’s

• initial velocity is positive and its acceleration is zero.

• initial velocity is positive and its acceleration is positive.

• initial velocity is positive and its acceleration is negative.

• initial velocity is negative and its acceleration is positive.

For a scooter with a negative acceleration, which of the following statements is always true?

• The scooter is losing speed.

• The final velocity of the scooter will be negative.

• The initial velocity of the scooter will be greater than its final velocity.

• The scooter will have a negative displacement.

In a diagram, the length of a vector arrow represents the

• type of vector.

• direction of the vector.

• magnitude of the vector.

• cause of the vector.

Which of the following quantities used to describe motion is an example of a vector quantity?

• distance

• speed

• time

• average velocity

A vector remains unchanged

• if it is moved in any direction.

• only if it is moved parallel to its original direction.

• only if it is rotated perpendicular to its original direction.

• only if it is not moved.

Which of the displacements, when added in the order given, will yield a displacement equal to d₁ + d₂ + d₃?

• d₃ + d₄ + d₁

• d₂ + d₁ + d₃

• d₂ + d₄ + d₃

• d₄ + d₃ + d₁

Which of the following represents the vector resulting in the subtraction of the displacement vectors d₂ - d₁ shown in the figure?

• 
• 
• 
• 

In the figure,

• d₁ = d₄

• d₁ = 2d₄

• d₂ = -2d₄

• d₃ = ½d₁

If vectors are moved according to the rules of the triangle method of vector addition, then the resultant vector is drawn

• from the tail of the first vector to the tail of the last vector.

• from the tail of the first vector to the tip of the last vector.

• from the tip of the first vector to the tail of the last vector.

• from the tip of the first vector to the tip of the last vector.