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2 years ago

2. The car slows down from 36 m/s to 15 m/s over a 3.0 second time interval. What is its average acceleration?

Physics

2 answers:

stira [4]2 years ago

7 0

Answer:

wendys

Explanation:nutz go in yo mouth

VMariaS [17]2 years ago

6 0

Answer:

9 meter per second square

Explanation:

acceleration equation is final minus initial velocity divided by time in seconds.

36-15/3=9 meter per second square.

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Answer quick!!! (Edge 2021)

mihalych1998 [28]

Answer:

I believe the answer is B.

7 0

3 years ago

Read 2 more answers

An object is dropped from a tower, 400 ft above the ground. The object's height above ground x seconds after the fall is s(x)

pav-90 [236]

1) 5 s

The vertical position of the object is given by

$y(t) = h - \frac{1}{2}gt^2 = 400 - 16 t^2$

where

h=400 ft represents the initial height

g = 32 ft/s^2 is the acceleration of gravity

t is the time

We want to find the time t at which the object reaches the ground, so the time t at which

y(t) = 0

By substituting this into the equation, we find

$0 = 400 - 16t^2\\t=\sqrt{\frac{400}{16}}=5 s$

2) 160 ft/s

The object is released from rest, so the initial velocity is zero

u = 0

The final vertical velocity can be found by using

$v^2 - u^2 = 2ah$

where

v is the final velocity

a = 32 ft/s^2 is the acceleration of gravity

h = 400 ft is the vertical distance covered

Solving for v, we find

$v=\sqrt{u^2 +2ay}=\sqrt{2(32 ft/s)(400 ft)}=160 ft/s$

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3 years ago

Lana does her homework as soon as she can after class, but she still doesn't undertand everything she suppose to learn. what cou

Lilit [14]

I added a screenshot with the complete question

Answer:
D. Ask her instructor questions about it the next day

Explanation:
We are given that Lana doesn't understand everything she's supposed to learn from the homework.

Let's check the options:
1- start working on it eve earlier
We know that she works on the homework as soon as she can. Working on it even earlier will not help her understand the difficult parts

2- put it off until she's ready to work on it
This is not the best option as it wont help her understand difficult parts. On the contrary, she might lose the time she has to practice the parts she understands and gain as much knowledge as possible

3- Only work on it directly before going to class.
this is the same as option 2. She might not even be able to finish it before the class

4- Ask her instructor questions about it the next day
This is the best solution as it will help her recap what she needs to learn and understand any difficult concepts as soon as possible which will help optimize her benefits

Hope this helps :)