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
vitfil [10]
3 years ago
10

An object is thrown vertically up and attains an upward velocity of 34 m/s when it reaches one fourth of its maximum height abov

e its launch point. What was the initial speed of the object?

Physics
1 answer:
lesantik [10]3 years ago
4 0

Answer:

39.26 m/s

Explanation:

Let the maximum height at which the object reaches is h.

Let the initial speed f the object is u.

velocity at height h/4 is 34 m/s

acceleration due to gravity = 9.8 m/s^2

For AB part

Use third equation of motion for AB part

here, initial velocity is v = 34 m/s

Final velocity at maximum height, v' = 0

Height = h - h/4 = 3h/4

v^{2}=u^{2}-2gh

0^{2}=34^{2}-2\times 9.8 \times \frac {3h}{4}

h = 78.64 m

For OA part

initial velocity = u

final velocity, v = 34 m/s

Height = h / 4 = 78.64 / 4 = 19.66 m

Use third equation of motion

v^{2}=u^{2}-2gh

34^{2}=u^{2}-2\times 9.8 \times 19.66

u^{2}=1541.336

u = 39.26 m/s

You might be interested in
Your science teacher has provided the following materials to investigate the factors that affect the strength of electric and ma
kodGreya [7K]

The strength of the electric field can be estimated as force per electric charge, whereas the strength of a magnetic field depends on the force of electrons and velocity.

<h3>Whta is a magnetic field?</h3>

A magnetic field can be defined as magnetic work exerted on electric charges that are in motion (movement).

Conversely, an electric field is an area where an electric current is applied and electron force can be estimated per Volts per Meter.

In conclusion, the strength of the electric field can be estimated as force per electric charge, whereas the strength of a magnetic field depends on the force of electrons and velocity.

Learn more about magnetic fields here:

brainly.com/question/14411049

#SPJ1

3 0
2 years ago
What would happen to the seasons if the Earth’s tilt was only 10 degrees and why? What about 50 degrees and why?
Varvara68 [4.7K]

Answer:

If it was only 10 degrees the seasonal changes would lessen and vise versa for 50. meaning the seasonal changes would become more extreme

Explanation:

8 0
3 years ago
Explain how we know dark matter exists if we cannot see it
Lubov Fominskaja [6]

Answer:

Gravitational lensing is how we know there is dark matter

What this means is that the light is bending as the light travels from the source to the observer, and if there are any 'holes' in between the beam, that is where 'dark matter' exists

Explanation:

5 0
3 years ago
(a) If an object travels along a line with constant velocity −24 ms, then the general formula for the position of the object is_
postnew [5]

Mathematically we know that the position is the integral of the velocity as a function of time, that is, the general formula for determining the position as a function of velocity would be given by

x(t) = x_0 +\int_0^t vdt

Here

x_0 represents the initial position, and the integral, the position with respect to the speed of the object within a certain time

Replacing and considering that there is no starting position,

v(t) = -24

x (t) = -24 \int dt

x(t) = -24t+C

7 0
3 years ago
Irene was investigating the behavior of gases at certain conditions. Which would most likely cause an increase in the rate of co
kipiarov [429]

Answer:

Increase in temperature

Increase in pressure

Explanation:

For the rate of collisions to increase, It can happen in various ways

1. The gasses can be made to move faster: This can be done by increasing their temperature. An increase in the temperature of the gases directly relates to a corresponding increase in their kinetic energy. This means that the molecules of the gases can move with a greater velocity, which will increase collision rates.

2. The volume of the container can be reduced: Consider this; If the container is made smaller, the molecules of the gases will have less space to move about. This means that they will be bumping into the walls of the container more frequently. This reduction in volume leads to an increase in the pressure of the gas. This is exactly what happens in a piston-cylinder assembly

6 0
4 years ago
Other questions:
  • What is the purpose of an experiment design?
    9·1 answer
  • which property of light is displayed when the energy of a wave is transferred into matter as the wave passes through it?
    9·1 answer
  • You approach a railroad crossing with a cross buck sign that has no lights or gates. What should you do?
    12·1 answer
  • The cockroach Periplaneta americana can detect a static electric field of magnitude 8.50 kN/C using their long antennae. If the
    5·1 answer
  • A 6.25-kg bowling ball moving at 8.95 m/s collides with a 0.95-kg bowling pin, which is scattered at an angle of θ = 27.5° from
    15·1 answer
  • A pitcher is in 85° of abduction, holding a 1.4 N baseball at point C, 65 cm from the joint axis at point O • The center of grav
    6·1 answer
  • Amit has found a rock in his backyard and would like to measure its mass, volume, and density. What tools can he use to perform
    10·1 answer
  • What is the maximum velocity that a 0.3–kilogram mass attached to a 0.75–meter string can have if the mass is whirled around in
    13·1 answer
  • If a spring is stretched to twice the lengtj of its equilibrium position, by what factor does the energy stored in the spring ch
    12·1 answer
  • The ratio of horizontal component and vertical component of
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!