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ANTONII [103]
3 years ago
8

A rubber band slingshot is drawn back 0.15 m with a force of 28N and shoots 28 g stone the initial speed of the stone if the rub

ber band is released is
Physics
1 answer:
maria [59]3 years ago
3 0

Answer:

Initial speed of stone = 12.25 m/s

Explanation:

Given:

Change in distance = 0.15 m

Force applied = 28 N

Find:

Initial speed of stone

Computation:

Using conservation of energy

(1/2)fs² = (1/2)(mv²)

fs² = (mv²)

(28)(0.15)² = (0.028)(v²)

v² = (28)(0.15)²/(0.028)

v = 12.25

Initial speed of stone = 12.25 m/s

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abruzzese [7]

Answer:

No

Explanation:

walking requires friction because if friction did not exist we would slide around without stopping

5 0
3 years ago
A car starts from rest with an acceleration of 6
mrs_skeptik [129]

Answer:

t=16.67s

Explanation:

From the question, acceleration from 6m/s^2  \ to \ 0m/s^2 in 10 seconds.

Acceleration function can be written as:-

a_t=6-0.6t

From the acceleration equation, we can obtain the velocity equation:

v(t)=\int\limits^t_b {0} \, dv=\int\limits^t_0 {a(t)} \, dt\\v(t)=\int\limits^t_0 {(6-06t)} \, dt=6t-0.3t^2\\*dv=a(t)dt

We calculate velocity after 10sec from the above v(t) as 30m/s.

To obtain distance travelled after 10 seconds:-

S=\int\limits^{10}_0 {6t-0.3t^2} \, dt=|3t^2-0.1t^3|   \ *lims(10,0)\\ S=200m

Therefore 200m is for 10seconds, and next 200m at 30m/s

Total time=10+\frac{200}{30}=16.67s

4 0
4 years ago
One group of students uses different methods to conserve water as listed below.
Deffense [45]
The best answer is b) <span>Method 1 and Method 3

Method 2, which is part of every other options, does involve using extra water because the dishwasher will necessarily use extra water, even if it is full when you use it. 
On the other hand, fixing leaky faucets requires no extra water and the recycled water used to wash your car has already been used. </span>
3 0
4 years ago
The speed of light in a transparent medium is 0.6 times that of its speed in vacuum. Find the refractive index of the medium.
grin007 [14]
<h2>Answer:</h2>

The refractive index is 1.66

<h2>Explanation:</h2>

The speed of light in a transparent medium is 0.6 times that of its speed in vacuum .

Refractive index of medium = speed of light in vacuum / speed of light in medium  

So

RI = 1/0.6 = 5/3 or 1.66

3 0
3 years ago
Read 2 more answers
Which of the following is not an example of work??
agasfer [191]

I would say B

Because technically if your just holding it your not doing anything

-May



5 0
3 years ago
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