For 1000 points! 1. An object has a velocity directed to the right, and an accel

Question

For 1000 points!

1. An object has a velocity directed to the right, and an acceleration directed to the left. Which statement is true?

The position of the object is increasing to the left with time, and its speed is increasing.

The position of the object is increasing to the right with time, and its speed is increasing.

The position of the object is not changing in time.

The position of the object is increasing to the right with time, and its speed is decreasing.

There is not enough information given to answer this question

2. Since vectors always have positive magnitudes, the sum of two vectors must have a magnitude greater than the magnitude of either one of them.

True          False

3. In the figure, Savannah and Zac are driving down the freeway side by side with their windows down. Zac wants to toss his physics book out the window and have it land in Savannah's front seat.

Ignoring air resistance, which way should he aim his throw?

1                2                3

4. A grasshopper leaps into the air at a 62

For 1000 points! 1. An object has a velocity directed to the right, and an acceleration directed to the left. Which statement is true? The position of the object is increasing to the left with time, and its speed is increasing. The position of the object is increasing to the right with time, and its speed is increasing. The position of the object is not changing in time. The position of the object is increasing to the right with time, and its speed is decreasing. There is not enough information given to answer this question 2. Since vectors always have positive magnitudes, the sum of two vectors must have a magnitude greater than the magnitude of either one of them. True False 3. In the figure, Savannah and Zac are driving down the freeway side by side with their windows down. Zac wants to toss his physics book out the window and have it land in Savannah's front seat n w n = w we can?????t tell about n without knowing v. 9. Draw a free body diagram for a crate sliding down a rough-surfaced ramp at constant speed. 10. An elevator suspended by a vertical cable is moving downward but slowing down. Draw a free-body diagram for the elevator. 7. A stalled car is being pushed up a hill by three people, and it is moving at a constant speed. The net force on the car is... Zero In the same direction as the car?????s motion In the opposite direction as the car?????s motion None of the above There?????s not enough information to know. 8. A car is rolling over the top of a hill at speed v. At this instant which is true: Ignoring air resistance, which way should he aim his throw? 1 2 3 4. A grasshopper leaps into the air at a 62° angle above the horizontal. At its highest point????: a. ????the velocity = 0 m/s True False b. ????the acceleration = 0 m/s2 True False 5. An object is moving to the right, and experiencing a net force that is directed to the right. The magnitude of the force is decreasing with time. The speed of the object is... increasing decreasing constant in time 6. This airplane if flying at a constant velocity. Draw a free-body diagram for the airplane.

Explanation / Answer

1) The position of the object is increasing to the right with time, and its speed is increasing

2) False

3) 1

4)
#a) true

#b) false

5) increasing

7) zero

8) n < w

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