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Sloan [31]
3 years ago
9

A bodybis thrown vertically upward with velocity of 30m/s calculate the the maximum height attained​

Physics
2 answers:
givi [52]3 years ago
6 0

Answer:

Answer in the attachment

Gennadij [26K]3 years ago
5 0

Explanation:

  • Initial velocity(v)=30 m/s
  • Final velocity(u)=0 m/s
  • Acceleration due to gravity(g)=9.8m/s²
  • Height(h)=?

Now,

By the third equation of motion, we have

  • v²=u²+2gh
  • 30²=0²+2×9.8×h
  • 900=0+19.6h
  • 900=19.6h
  • 900/19.6=h
  • h=45.918 m
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Answer:

Explanation:

Time to cover first 100 km = 1 hour.

time remaining = 3.15 - 1 = 2.15 hour .

Time to cover next 42 km = 1 hour .

Time remaining = 2.15-1 = 1.15 hour.

Distance to be covered = 310 - 142

= 168 km

least speed needed = distance remaining / time remaining

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4 0
3 years ago
What occurs when an object travels in a curved path
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7 0
3 years ago
When a wheel is rotated through an angle of 21◦ , a point on the circumference travels through an arc length of 2.1 m. When the
LiRa [457]

Answer:

R = 5.73 m

Explanation:

For an angle of rotation through 21 degree we know that

arc length is given as

angle \times Radius = Arc

now we know that

Arc = 2.1 m

Angle = 21 degree

Angle = 21\times \frac{\pi}{180}

so now we have

21\times \frac{\pi}{180} = \frac{2.1}{R}

R = \frac{2.1 \times 180}{21 \times \pi}

R = 5.73 m

6 0
3 years ago
If a 8.1g ring is heated using 10.0 ), its temperature rises 21.7°C. Calculate the specific
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the water specific heat will remain at 4.184.
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3 years ago
A straightforward method of finding the density of an object is to measure its mass and then measure its volume by submerging it
Veseljchak [2.6K]

Incomplete question as the unit of volume is not written correctly.So the complete question is here:

A straightforward method of finding the density of an object is to measure its mass and then measure its volume by submerging it in a graduated cylinder. What is the density of a 240-g rock that displaces 89.0 cm³?

Answer:

d_{Density}=2.7g/cm^{3}

Explanation:

Given data

Mass m=240g

Volume V=89.0 cm³

To find

Density d

Solution

If rock displaces 89.0 cm³ of water means volume of rock is also 89cm³

So

d_{Density}=\frac{mass}{volume}\\d_{Density}=\frac{240g}{89.0cm^{3} } \\d_{Density}=2.7g/cm^{3}

5 0
2 years ago
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