1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
lesya692 [45]
3 years ago
7

You throw a stone upward from the top of a building at an angle of 25° to the horizontal and with an initial speed of 15 m/s. I

f the stone is in flight for 3.0 s, how tall is the building? How far from the base of the building does the stone.
Physics
1 answer:
Alex787 [66]3 years ago
6 0

Answer:

11.025 m

87.75 m

Explanation:

Time of flight(T) of a projectile = 2U(sin∅)/g

Where U = initial Velocity, g = acceleration due to gravity, ∅= angle of projection.

Make ∅ the subject of the the equation,

∅ = sin⁻¹[(T× g)/2U]

Where U = 15m/s, T= 3.0 s, g = 9.8 m/s²

∅ = sin⁻¹[(3 × 9.8)/(2×15)]

∅ = sin⁻¹(29.4/30)

∅= sin⁻¹(0.98) = 78.52°

Using the formula for maximum height of a projectile

H = U²sin²∅/2g

H = 15²(sin²78.52)/2 × 9.8

H = 225(0.98 × 0.98)/19.6

H = 216.09/19.6

H = 11.025 m

Range (R) = U²sin2∅/g

R = 15²sin(2×79.52)/9.8

R = 225(0.39)

R =87.75 m

∵ the building is = 11.025 m tall and the base of the building is 87.75m away from where the stone landed.

You might be interested in
A capacitor is charged to a potential difference of 3 volt it delivers 30% store energy to lamp what is the final potential diff
nexus9112 [7]

Answer:

3.98V

Explanation:

Given

Pontential difference V as 3v

Energy delivered is 30%,

Recall that Enery E=1/2cv^2 from this E=V^2(since Current C is not provided we can assume a value 2)

So E=V^2

E=3^2=9

At full charge E=9,30%of 9,0.3*9=2.7 energy in capacitor is 9-2.7=6.3

But E=V^2

✓E=V

✓6.3=3.98V

4 0
3 years ago
How can I become a good science student ?​
iris [78.8K]

Answer:

Study hard , focus on your studies and alyways ask questions .

7 0
2 years ago
Read 2 more answers
Which statement best describes beaches? Beaches change over time as waves move further up the shore. Beaches are always changing
NemiM [27]

Answer:

I think the 1st statement is right.

Explanation:

Wind patterns doesn't stay the same.

Waves don't follow the same patterns.

Waves move further up the shore.

I didn't hear about "waves adding" before..so i guess 1st statement is right.

3 0
3 years ago
two identical small charged spheres are a certain distance apart, and each one initially experiences an electrostatic force of m
alexdok [17]
The electrostatic force is directly proportional to the product of the charges, by Coulomb's law.

F α Qq

If the charges are now half the initial charges: 

<span>F α (1/2)Q *(1/2)q
</span>
F α (1/4)Q<span>q

The new force when the charges are each halved is (1/4) the first initial force experienced at full charge.</span>
4 0
3 years ago
Read 2 more answers
Takumi works in his yard for 45 minutes each Saturday. He works in the morning, and he wears sunscreen and a hat each time he wo
Arte-miy333 [17]

takumi wants to reduce the chance of getting a sunburn :D

<em>hope this helps!</em>

<em>have a great day :)</em>

6 0
3 years ago
Read 2 more answers
Other questions:
  • Suppose we could shrink the earth without changing its mass..?At what fraction of its current radius would the free-fall acceler
    10·2 answers
  • You know your mass is 62 kg but when you stand on a bathroom scale in an elevator it says your mass is 77 kg what is the acceler
    12·1 answer
  • I’m Not Sure What To Do ..
    9·1 answer
  • If the temperature of the metal oxide and water solution is increased,this would most likely..
    11·1 answer
  • Flooding on rivers is caused by human activity rather than natural events. Please select the best answer from the choices provid
    8·2 answers
  • A coil of 40 turns is wrapped around a long solenoid of cross-sectional area 7.5×10−3m2. The solenoid is 0.50 m long and has 500
    8·1 answer
  • Is orange juice in an orange potential energy or kinetic energy?
    12·2 answers
  • Imagine a 10kg block moving with a velocity of 20m/s to the left.
    11·1 answer
  • A radio telescope has a circular collecting dish of diameter 5.0 m. It is used to observe two distant
    9·1 answer
  • A car goes East from 2 m/s to 16m/s in 3.5s. What is the Car's acceleration?
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!