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andrew11 [14]
3 years ago
13

you are building a race car. Your goal is to have a car that can go from 0 miles per hour to 80 miles per hour in 2 seconds. You

are focusing on the car's
Physics
2 answers:
Vitek1552 [10]3 years ago
6 0
<span>You want to focus on the car's acceleration.
(Hope this helps you! :) Have a nice day!)</span>
vodka [1.7K]3 years ago
3 0

Answer : Acceleration of the car is 17.89\ m/s^2

Explanation :

Initial velocity of the car, u = 0 miles

Final velocity of the car, v = 80 miles/hour = 35.77 m/s

Time taken, t = 2 s

So, from the above data we are focusing on the velocity of the car w.r.t to time i.e. acceleration of the car.

a=\dfrac{v-u}{t}

a=\dfrac{35.77\ m/s-0}{2\ s}

a=17.89\ m/s^2

So, the car of the car is 17.89\ m/s^2

Hence, this is the required solution.

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The third floor of a house is 8m above street level. How much work is needed to move a 136kg refrigerator to the third floor?
jonny [76]

m = Mass of the refrigerator to be moved to third floor = 136 kg

g = Acceleration due to gravity by earth on the refrigerator being moved = 9.8 m/s²

h = Height to which the refrigerator is moved  = 8 m

W = Work done in lifting the object

Work done in lifting the object is same as the gravitational potential energy gained by the refrigerator. hence

Work done = Gravitation potential energy of refrigerator

W = m g h

inserting the values

W = (136) (9.8) (8)

W = 10662.4 J



8 0
2 years ago
A wheel, starting from rest, rotates with a constant angular acceleration of 1.80 rad/s^2. During a certain 7.00 s interval, it
lora16 [44]

Answer:

a) 1.3 rad/s

b) 0.722 s

Explanation:

Given

Initial velocity, ω = 0 rad/s

Angular acceleration of the wheel, α = 1.8 rad/s²

using equations of angular motion, we have

θ2 - θ1 = ω(0)[t2 - t1] + 1/2α(t2 - t1)²

where

θ2 - θ1 = 53.2 rad

t2 - t1 = 7s

substituting these in the equation, we have

θ2 - θ1 = ω(0)[t2 - t1] + 1/2α(t2 - t1)²

53.2 =ω(0) * 7 + 1/2 * 1.8 * 7²

53.2 = 7.ω(0) + 1/2 * 1.8 * 49

53.2 = 7.ω(0) + 44.1

7.ω(0) = 53.2 - 44.1

ω(0) = 9.1 / 7

ω(0) = 1.3 rad/s

Using another of the equations of angular motion, we have

ω(0) = ω(i) + α*t1

1.3 = 0 + 1.8 * t1

1.3 = 1.8 * t1

t1 = 1.3/1.8

t1 = 0.722 s

5 0
3 years ago
Explain why offspring may or may not resemble either parent
katen-ka-za [31]
The offspring can have some features for the parents relatives and can look nothing like the parents. They can look exactly alike to more of one parent then the other or have features from both parents as well
Hope this helps :3
6 0
3 years ago
Read 2 more answers
Matter can undergo chemical reactions and nuclear reactions. Which
NeX [460]

Answer:

<em>D.) state of matter</em>

Explanation:

it can undergo chemical but not nuclear.

6 0
2 years ago
What are three characteristic properties of matter?
Licemer1 [7]
Physical characteristics of matter include its mass<span>, weight, volume, and </span>density<span>. It also specifically describes its odor, shape, texture, and </span>hardness<span>. In addition, physical properties describe whether the object is a solid, a liquid, or a gas – its phase of matter at room temperature.</span>
4 0
3 years ago
Read 2 more answers
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