![sindy35111](/avatars/291.jpg)
sindy35111
08.02.2021 •
Physics
A train 350 m long is moving on a straight track with a speed of 84.1 km/h. The engineer applies the brakes at a crossing, and later the last car passes the crossing with a speed of 15.8 km/h. Assuming constant acceleration, determine how long the train blocked the crossing. Disregard the width of the crossing.
Solved
Show answers
More tips
- P Philosophy What is Something for you?...
- S Style and Beauty Intimate Haircut: The Reasons, Popularity, and Risks...
- A Art and Culture When Will Eurovision 2011 Take Place?...
- S Style and Beauty How to Choose the Perfect Hair Straightener?...
- F Family and Home Why Having Pets at Home is Good for Your Health...
- H Health and Medicine How to perform artificial respiration?...
- H Health and Medicine 10 Tips for Avoiding Vitamin Deficiency...
- F Food and Cooking How to Properly Cook Buckwheat?...
- F Food and Cooking How Many Grams Are In a Tablespoon?...
- L Leisure and Entertainment Carving: History and Techniques for Creating Vegetable and Fruit Decorations...
Answers on questions: Physics
- S Social Studies Do external rewards—things like money, praise, fame, and grades—promote creativity? researcher teresa amabile designed an experiment to find out. she recruited 47 experienced creative...
- M Mathematics Find the values of x and y. (2x + 5) 15x - 1774 13x – 118 -11...
- B Biology Insects are best photographed at midday when the insects are more active. a. true b. false...
Ответ:
t = 25.0 s
Explanation:
Assuming that the engineer applies the brakes just over the crossing, the train moves exactly 350 m at a constant acceleration, with a final speed (when the last car of the train leaves the crossing) of 15.8km/h.Since we know the initial and final speeds, and the horizontal distance traveled (the length of the train) we can use the following kinematic equation to get the acceleration:Ответ:
C
Explanation:
trust?