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In which one of the following situations does the car have a westward acceleration?

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6 years ago

Date created

Mar 1, 2020

Cards (14)

Section 1

(14 cards)

In which one of the following situations does the car have a westward acceleration?

Front

Te car travels eastward and slows down

Back

A baseball is hit upward and travels along a parabolic arc before it strikes the ground. Which one of the following statements is necessarily true?

Front

The x-component of the velocity of the ball is the same throughout the ball's flight.

Back

Which statement is true concerning the ball when it is at C, the highest point in its trajectory?

Front

The ball's velocity is perpendicular to its acceleration.

Back

The drawing shows projectile motion at three points along the trajectory. The speeds at the points are v1, v2, and v3. Assume there is no air resistance and rank the speeds, largest to smallest. (Note that the symbol ">" means "greater than".)

Front

V1>V3>V2

Back

During a relay race, runner A runs a certain distance due north and then hands off the baton to runner B, who runs for the same distance in a direction south of east. The two displacement vectors A and B can be added together to give a resultant vector R. Which drawing correctly shows the resultant vector?

Front

A+B=R head to tail head to head

Back

A student adds two displacement vectors with magnitudes of 6.0 m and 8.0 m, respectively. Which one of the following could not be a possible choice for the resultant?

Front

14.8m

Back

Vectors , A,B, and C satisfy the following equation A+B=C, and their magnitudes are related by the scalar equation . How is vector A oriented with respect to vector B?

Front

Vectors A and B are collinear and point in the same direction

Back

A tennis ball is thrown upward at an angle from point A. It follows a parabolic trajectory and hits the ground at point D. At the instant shown, the ball is at point B. Point C represents the highest position of the ball above the ground. While in flight, how do the x and y components of the velocity vector of the ball compare at the points B and C?

Front

The x components are the same; the y component at C is zero m/s.

Back

Only one of the following is possible for a moving object. Which one?

Front

The velocity is zero at one instant, and the acceleration is not zero at that instant.

Back

Which one of the following statements is not true?

Front

Near the earth's surface the acceleration due to gravity has the approximate magnitude of 9.80 m/s2, points downward when the motion is downward, and points upward when the motion is upward.

Back

While in flight, how do the x and y components of the velocity vector of the ball compare at the points A and D?

Front

The velocity components have the same magnitudes at both points, but the directions of the y components are reversed.

Back

Each drawing shows three points along the path of a projectile, one on its way up, one at the top, and one on its way down. The launch point is on the left in each drawing. Which drawing correctly represents the acceleration a of the projectile at these three points?

Front

All accelerations are pointed down

Back

In preparation for this question, review Conceptual Example 7. Vectors A and B satsify the vector equation A+B=0 . How does the magnitude and direction of B compare to the magnitude and direction of A?

Front

Magnitudes are the same, but their directions aren't

Back

Can two nonzero perpendicular vectors be added together so their sum is equal to zero?

Front

No

Back