Question

The velocity vs. time graph is shown for a cart moving on a track in front of a motion sensor. a) For each of the four graph sections, answer the following in the table below (or write answers on your own paper): i) Does it move toward or away from the origin? ii) Does it gain speed, lose speed, or have constant speed? Graph section | Answer (i) | Answer (ii) (1) | | (2) | | (3) | | (4) | | b) At which of the two points does the cart reverse direction: point A or B? Explain how you know. I throw a ball vertically upward. The moment after it leaves my hand, the ball is 1.50 m above the ground, and moving at 2.10 m/s. Assume up is positive. Be careful with signs. As always include setup, symbols, and solution. Find the following: a) The ball's velocity the moment before it hits the ground. b) Time it takes until the ball hits the ground.

          The velocity vs. time graph is shown for a cart moving on a track in front of a motion sensor.
a) For each of the four graph sections, answer the following in the table below (or write answers on your own paper):
i) Does it move toward or away from the origin?
ii) Does it gain speed, lose speed, or have constant speed?

Graph section | Answer (i) | Answer (ii)
(1) | | 
(2) | | 
(3) | | 
(4) | | 

b) At which of the two points does the cart reverse direction: point A or B? Explain how you know.

I throw a ball vertically upward. The moment after it leaves my hand, the ball is 1.50 m above the ground, and moving at 2.10 m/s. Assume up is positive. Be careful with signs. As always include setup, symbols, and solution. Find the following:
a) The ball's velocity the moment before it hits the ground.
b) Time it takes until the ball hits the ground.

The velocity vs. time graph is shown for a cart moving on a track in front of a motion sensor.
a) For each of the four graph sections, answer the following in the table below (or write answers on your own paper):
i) Does it move toward or away from the origin?
ii) Does it gain speed, lose speed, or have constant speed?

Graph section | Answer (i) | Answer (ii)
(1) | |
(2) | |
(3) | |
(4) | |

b) At which of the two points does the cart reverse direction: point A or B? Explain how you know.

I throw a ball vertically upward. The moment after it leaves my hand, the ball is 1.50 m above the ground, and moving at 2.10 m/s. Assume up is positive. Be careful with signs. As always include setup, symbols, and solution. Find the following:
a) The ball's velocity the moment before it hits the ground.
b) Time it takes until the ball hits the ground.

Added by Susan V.

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