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
Aleks04 [339]
3 years ago
9

The speed of a projectile when it reaches its maximum height is 0.58 times its speed when it is at half its maximum height. What

is the initial projection angle of the projectile?
Physics
1 answer:
Ne4ueva [31]3 years ago
6 0

Speed of the projectile at its maximum height is only along horizontal direction

so at highest point

v_1 = v_x

now when he is at half of the maximum height the speed will be in x and y direction both

v_2 = \sqrt{v_y^2 + v_x^2}

here it is given that

v_1 = 0.58 v_2

v_x = 0.58\sqrt{v_x^2 + v_y^2}

2.97 v_x^2 = v_x^2 + v_y^2

1.97 v_x^2 = v_y^2

also we know that

v_y^2 = v_{iy}^2 - 2 g \frac{H}{2}

here we know that maximum height is given as

H = \frac{v_{iy}^2}{2g}

v_y^2 = v_{iy}^2 - 2 g\frac{v_{iy}^2}{4g}

v_y^2 = \frac{v_{iy}^2}{2}

now from above

1.97 v_x^2 = \frac{v_{iy}^2}{2}

1.98 v_x = v_{iy}

also we know that angle of projection is

tan\theta = \frac{v_{iy}}{v_x}

tan\theta = \frac{1.98v_x}{v_x}

so angle is

\theta = tan^{-1} 1.98

\theta = 63.3 degree

You might be interested in
A small charged bead has a mass of 1.9 g . it is held in a uniform electric field e⃗ = (200,000 n/c, up). when the bead is relea
dmitriy555 [2]

As we know that when charge is released in electric field

It will have two forces on it

1. electrostatic force

2. gravitational force

now if the ball will accelerate upwards so we can say

net upward force = mass * acceleration

qE - mg = ma

q*200000 - 1.9 * 10^{-3}* 9.8 = 1.9 * 10^{-3}* 15

now we can find charge q on it by above equation

q = 0.2356 * 10^{-6} C

So above is the charge on the particle

7 0
3 years ago
What best describes why warm ocean currents usually surface currents
hodyreva [135]
Surface currents are caused by winds. They move warm water away from the equator and cool water away from the poles.

Hope it help
3 0
3 years ago
H<br>Ggghffyjfdudjhfhghggffghjjdxv
amid [387]

Answer:

H

Ggghffyjfdudjhfhghggffghjjdxv

Explanation: The law of copying

6 0
3 years ago
A track is mounted on a large wheel that is free to turn with negligible friction about a vertical axis (Fig. 11-48).A toy train
masya89 [10]

Answer:

0.166 rad/s

Explanation:

See attachment for calculations

5 0
3 years ago
Read 2 more answers
What do scientists theorize about the origins of the Moon? Choose the most accepted explanation.
Darina [25.2K]

Answer:

What is most widely accepted today is a the giant-impact theory. It proposes that the Moon formed during a collision between the Earth and another small planet, about the size of Mars. The debris from this impact collected in an orbit around Earth to form the Moon.

8 0
3 years ago
Other questions:
  • If you pour different liquids into a graduated cylinder, which layer would be at the bottom?
    7·1 answer
  • Help quick
    13·2 answers
  • Which of the following characterizes Erikson's identity versus role formation stage?
    13·2 answers
  • The speed of an electromagnetic wave is equal to
    5·1 answer
  • In a region of space, a magnetic field points in the +x-direction (toward the right). Its magnitude varies with position accordi
    14·1 answer
  • You are standing in a moving bus, facing forward, and you suddenly fall forward as the bus comes to an immediate stop. the force
    12·1 answer
  • As the temperature of water drops, it continues to give off thermal energy until it freezes. This is an example of.
    6·2 answers
  • If a baseball is in space and someone hits it with a bat what does the ball do
    10·1 answer
  • A 50 W light bulb is plugged into a standard
    9·1 answer
  • Why do some quasars have red shifts greater than 1?.
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!