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Artist 52 [7]
3 years ago
14

Alex Rode her skateboard her velocity changed from 3m/s to 1m/s in 4 seconds. What was her acceleration?

Mathematics
1 answer:
ryzh [129]3 years ago
7 0
You can use the acceleration formula: 

a = \frac{\Delta v}{\Delta t}
a = \frac{1 - 3 }{4 - 0}
a = \frac{-2 }{4}
a = -\frac{1 }{2} = -0.5

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The 3kg object in Figure is released from rest at a height of on a curved frictionless ramp.
yanalaym [24]

The object compresses the spring up to 0.8577m.

<h3>What is Potential Energy?</h3>

Potential Energy is the energy possessed by an object at rest.

The object is falling from the rest and it is assumed that the friction on the ramp is zero and the air resistance is also considered to be zero so only the gravitational force acts and the total potential energy gets converted to Kinetic Energy.

The total amount of potential energy at the top of the ramp is given by

Ep=mgh

Ep=3 * 9.81 *5

Ep=147.15 Joules

This is equal to kinetic energy.

From the formula for elastic potential energy

The distance up to which the spring is compressed is determined

The force constant = 400N/m

147.15 =(1/2)k(x²)

294.3=(400)(x²)

0.73575=x²

x=0.8577 m

So, the object compresses the spring up to 0.8577m.

  • When the object compresses the spring, the potential energy of the spring is converted into Kinetic Energy so it will push the object back again.

To know more about Potential Energy

brainly.com/question/24284560

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3 0
1 year ago
Please help!! Rewrite the formula to determine the amount of money they will make.
leva [86]
We have this equation to start with: m/n = 5.5. To achieve the desired equation, you need to multiply the entire equation by n, giving you this equation: m = 5.5n. Hope this helps!
3 0
2 years ago
8w – 16-20 + 7w - 11y - 4y<br> Can someone show me how to do this step by step?
AveGali [126]

Answer:

-44

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
Ill give brainliest to the correct answer
Alexxandr [17]

Answer:

7 x 4 = 28

28 x 1/2(dividing by 2) = 14, 14 x 2(two triangles) = 28

4 x 5 = 20(area of square in the middle)

5 x 8 = 40(area of square on one side), 40 x 2 = 80(area of squares on both sides)

Now lets add the given areas:

28 + 20 + 80 = 128 square is your answer.

3 0
2 years ago
The ans to 3/4+2/3 when using a common denominator to add unlike fractions
pychu [463]

Answer:

17/12 = 1 5/12

Step-by-step explanation:

The common denominator of 4 and 3 is 12.

The equivalent fraction of 3/4 is 9/12.

The equivalent fraction of 2/3 is 8/12.

Their total is 17/12 (or 1 5/12).

5 0
2 years ago
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