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
RideAnS [48]
3 years ago
14

1.) A ball is thrown horizontally from the top of a building. What is the vertical velocity of the ball after 1 second?

Physics
2 answers:
MatroZZZ [7]3 years ago
7 0

Answer:

  1. B. 9.8 m/s
  2. A. 0 m/s²
  3. C. 45°
  4. B. 70°
  5. D. uniformly accelerated motion

Explanation:

1.

u=0m/s

v=?

a=9.8m/s²

t=1sec

now

we have

v=u+at

v=0+9.8*1

v=9.8m/s

3.

angle is measured in sin and cos angle where maximum angle's value is gained by 45°

4.

we have

range

R=\frac{u²sin2\theta}{g}

For

angle =20°

R1=\frac{u²sin2*20}{g}.......[1]

another angle be \theta

R2=\frac{u²sin2\theta}{g}.......[2]

since R1=R2

By comparing we get

Sin40=Sin(2\theta)

Sin(180-40)=Sin(2\theta)

we

140=2\theta

\theta=70°

BARSIC [14]3 years ago
6 0
  1. 9.8
  2. zero
  3. 45
  4. not sure - 70
  5. Uniform accelerated motion
You might be interested in
If the mass of a material is 111 grams and the volume of the material is 23 cm3, what would the density of the material be? g/cm
Butoxors [25]
Density can be kg/m^3 or g/cm3
In g/cm3 density =mass /volume =111g/23cm3
=4.826g/cm3.

In kg/m3,density=mass/volume. converting mass in grams to kg, 1000g=1kg,111g=0.111kg.
cm3 to m3, 1cm3=10^-6m3, 23cm3=0.000023m3
density=0.111kg/0.000023m3 or 2.3*10^-5=4,826.1kg/m3.

the other is a long process.
4 0
3 years ago
Define motion also justify that rest and motion are related terms​
Damm [24]

Answer;

Motion: A body is said to be in motion if it changes its position with respect to its surroundings.

Explanation:

Rest and motion are the relative terms because they depend on the observer's frame of reference. So if two different observers are not at rest with respect to each other, then they too get different results when they observe the motion or rest of a body .

one example for each. Rest: If a body does not change its position with respect to its surroundings, the body is said to be at rest. ... Motion: A body is said to be in motion if it changes its position with respect to its surroundings.

6 0
3 years ago
car traveling on a flat (unbanked), circular track accelerates uniformly from rest with a tangential acceleration of a. The car
Luba_88 [7]

Answer:

0.572

Explanation:

First examine the force of friction at the slipping point where Ff = µsFN = µsmg.

the mass of the car is unknown,

The only force on the car that is not completely in the vertical direction is friction, so let us consider the sums of forces in the tangential and centerward directions.

First the tangential direction

∑Ft =Fft =mat

And then in the centerward direction ∑Fc =Ffc =mac =mv²t/r

Going back to our constant acceleration equations we see that v²t = v²ti +2at∆x = 2at πr/2

So going backwards and plugging in Ffc =m2atπr/ 2r =πmat

Ff = √(F2ft +F2fc)= matp √(1+π²)

µs = Ff /mg = at /g √(1+π²)=

1.70m/s/2 9.80 m/s² x√(1+π²)= 0.572

7 0
3 years ago
A white dwarf is not continuing in nuclear fusion, yet it still shines brightly for thousands of years because...
Afina-wow [57]

Explanation:

Understanding that stars are naturally quite hot, imagine I pulled a piece of hot iron from a furnace. It would glow a bright red, and then slowly fade to black as the iron cools.

White dwarfs glow for the same reason - they are HOT!

3 0
3 years ago
If the amplitude of the resultant wave is twice as great as the amplitude of either component wave, and the wave exhibits reinfo
Lunna [17]
Be in phase with each other! otherWise B
5 0
3 years ago
Read 2 more answers
Other questions:
  • Discuss the role of the expanded functions dental assistant in making a provisional coverage
    6·1 answer
  • A non conducting sphere of radius 0.04 m has a charge of 5.0 × 10^-9 C deposited on it. CalculateThe magnitude of the electric f
    11·1 answer
  • Newspapers used as covers to keep out the cold were called _________.
    7·1 answer
  • Location X is next to Location Y and they are both much colder than Location Z. Which statement is most likely true?
    11·1 answer
  • A spherical balloon has a radius of 6.35 m and is filled with helium. The density of helium is 0.179 kg/m3, and the density of a
    5·1 answer
  • 1. a) What is the weight of a 20.0 kg girl on earth?
    15·1 answer
  • What causes a rolling object
    13·1 answer
  • What can i do to recycle?
    9·1 answer
  • A particular roller coaster has a mass of 3500 kg, a height of 4.0 m, and a velocity of 12 m/s. What is the kinetic energy? If n
    13·1 answer
  • The graph represents velocity over time.<br> What is the acceleration?
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!