Question

1. Annie is traveling on a trail at 21.7 m/s. After traveling for 12.5 seconds at a constant velocity she approaches a stoplight which has turned red. Being a good doggo she slows to a stop with an acceleration of -2.13 m/s^2 as she nears the stoplight.

What is her displacement during the first 6 seconds of movement?

2. Annie is traveling on a trail at 24.5 m/s. After traveling for 12.4 seconds at a constant velocity she approaches a stoplight which has turned red. Being a good doggo she slows to a stop with an acceleration of -2.11 m/s^2 as she nears the stoplight.

What is her average velocity for the entire motion?

3.  

A ball is thrown directly downward at a speed of 3.6 m/s off the top of Building 15. The ball passes the classroom we are not in 3.9 meters below the top of the building on its way down to the sidewalk below. The ball hits the ground with a speed of 15.8 m/s.  Assume "up" is positive.

What is the total height of Building 15 in meters?

4.

A ball is thrown directly downward at a speed of 3.6 m/s off the top of Building 15 at TCC. The ball passes the classroom we are not in 3.1 meters below the top of the building on its way down to the sidewalk below. The ball hits the ground with a speed of 15.1 m/s. Assume "up" is positive.

What is the speed of the ball in m/s as it passes the classroom we could have been in?

Answer 1

Solution :