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r-ruslan [8.4K]
4 years ago
7

An object is thrown directly upward at 2 m/s. How high will the object go?

Physics
1 answer:
kaheart [24]4 years ago
5 0
Gygyyihib
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A stuntwoman is going to attempt a jump across a canyon that is 77 m wide. The ramp on the far side of the canyon is 25 m lower
liq [111]

initial speed of the stuntman is given as

v = 28 m/s

angle of inclination is given as

\theta = 15 degree

now the components of the velocity is given as

v_x = 28 cos15 = 27.04 m/s

v_y = 28 sin15 = 7.25 m/s

here it is given that the ramp on the far side of the canyon is 25 m lower than the ramp from which she will leave.

So the displacement in vertical direction is given as

\delta y = -25 m

\delta y = v_y * t + \frac{1}{2} at^2

-25 = 7.25 * t - \frac{1}{2}*9.8* t^2

by solving above equation we have

t = 3.12 s

Now in the above interval of time the horizontal distance moved by it is given by

d_x = v_x * t

d_x = 27.04 * 3.12 = 84.4 m

since the canyon width is 77 m which is less than the horizontal distance covered by the stuntman so here we can say that stuntman will cross the canyon.

5 0
3 years ago
How can I protect my computer from being shot by an MBT
Pie

Answer: While Technology is Evolving so is Hackers that being said "Norton Vpn" would be beneficial for computer protection.

Explanation:

4 0
3 years ago
Can someone please help me out?
maria [59]

Explanation:

If you want to get speed, u have to divided distance over time

The lowest speed will lose

8 0
4 years ago
Read 2 more answers
A 3 inch fire hose has a water flow of 200 gallons per minute. What is the flow in liters per second? Note: Use US gallons not U
stepladder [879]

Answer:

Case I: 12.617 L/s

Case II: 161.406 cubic meters per hour

Case III: 1.062 Pound inches

Explanation:

<u>Given:</u>

  • Speed of water flow = 200 gallons per minute
  • Speed of air blow = 95 cubic feet per minute
  • Measure of Torque = 12 Newton centimeter

<u>Assumptions:</u>

  • 1 US gallon = 3.785 L
  • 1 min = 60 s
  • 1 ft = 0.3048 m
  • 1 h = 60 min
  • 1 inch = 2.54 cm
  • 1 N = 0.2248 lb

Case I:

Speed\ of\ water\ flow = 200 \dfrac{gallon}{min}\\\Rightarrow V_{water} = 200\times \dfrac{3.785\ L}{60\ s}\\\Rightarrow V_{water} = 12.617\ L/s

Case II:

Speed\ of\ air\ blow = 95 \dfrac{ft^3}{min}\\\Rightarrow V_{air} = 95\times \dfrac{(0.3048\ m)^3}{\dfrac{1}{60}\ h}\\\Rightarrow V_{air} = 95\times (0.3048)^3\times 60\ m^3/h\\\Rightarrow V_{air} = 161.406\ m^3/h

Case III:

Measure\ of\ torque = 12\ N cm\\\Rightarrow \tau = 12\times (0.2248\ lb)\times \dfrac{1}{2.54}\ in\\ \Rightarrow \tau = 1.062\ lb in

6 0
3 years ago
An initially electrically neutral conducting sphere is placed on an insulating stand. A negatively-charged glass rod is brought
balu736 [363]

Answer: Option (c) is the correct answer

Explanation:

It is known that when a neutral object comes in contact with a charged object then an opposite charge develops on the neutral object. But this development of charge occurs only when both the objects come in contact and if they are not in contact with each other then there occurs no charge on the neutral object.

As in the given situation, negatively-charged glass rod is brought near, but does not touch the sphere. So, there will occur no charge on the sphere.

Thus, we can conclude that final charge on the sphere is neutral.

7 0
3 years ago
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