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
Dvinal [7]
4 years ago
5

Projectile's horizontal range on level ground is R=v20sin2θ/g. At what launch angle or angles will the projectile land at half o

f its maximum possible range. Enter your answers numerically separated by commas. Express your answer using two significant figures.
Physics
1 answer:
seraphim [82]4 years ago
7 0

Answer:

\theta = 15^o \: or\: 75^o

Explanation:

As we know that the formula of range is given as

R = \frac{v^2sin2\theta}{g}

now we know that

maximum value of the range of the projectile is given as

R_{max} = \frac{v^2}{g}

now we need to find such angles for which the range is half the maximum value

so we will have

\frac{R}{2} = \frac{v^2}{2g} = \frac{v^2sin(2\theta)}{g}

sin(2\theta) = \frac{1}{2}

2\theta = 30 or 150

\theta = 15^o \: or\: 75^o

You might be interested in
I KNOW YALL SEE THIS I NEED HELP GOD WILL GIVE U MANY BLESSING HELP A POOR SOUL OUT THE RECENT QUESTIONSSSSSSSSSSSSS. ://///
photoshop1234 [79]

Answer:

ok

Explanation:

will do

4 0
3 years ago
Read 2 more answers
A 2 kg ball is released from rest at the top of a track and
xz_007 [3.2K]
A) The formula for kinetic energy is E = 1/2 mv^2, so the energy of the ball is 1/2 * 2 * 10^2 = 100J. b) Energy is always conserved, and so if no energy is lost to resistive forces then all 100J of kinetic energy came from its potential energy at the top of the track. c) The formula for potential energy is E = mgh, which we can rearrange for h = E/mg. We know the energy, the mass and the strength of gravity, so we can find h = 100 / (2*9.81) = 5.10m.
7 0
3 years ago
The units of Work, Energy and power are________ ________units.
meriva

Answer:

the units of work and energy is joule and unit of power is Watt

4 0
2 years ago
What is the story of coal​
Alika [10]

Explanation:

Coal is a fossil fuel and is the altered remains of prehistoric vegetation. The energy we get from coal today comes from the energy that plants absorbed from the sun millions of years ago. In the burning process of coal, carbon dioxide (CO2) is emitted. Humans expel CO2, and plants utilize it every single day. Carbon is a building block for all forms of life and is used in a lot of everyday products.

Coal is a combustible black or brownish-black sedimentary rock, formed as rock strata called coal seams. Coal is mostly carbon with variable amounts of other elements, chiefly hydrogen, sulfur, oxygen, and nitrogen.Coal is formed when dead plant matter decays into peat and is converted into coal by the heat and pressure of deep burial over millions of years. Vast deposits of coal originate in former wetlands—called coal forests—that covered much of the Earth's tropical land areas during the late Carboniferous (Pennsylvanian) and Permian times. However, many significant coal deposits are younger than this and originate from the Mesozoic and Cenozoic eras.

3 0
3 years ago
Read 2 more answers
Nicolo` works on weekends at a Slow Food Parlor. He fills a pitcher full of Cola, places it on the counter top and gives the 2.6
Slav-nsk [51]

Answer:4.22 J

Explanation:

Given

mass of pitcher m=2.6\ kg

Force applied  F=8.8\ N

distance moved s=48\ cm

Applying work-Energy theorem which states that work done by all the forces is equal to the change in kinetic energy of the object

Work done by force W=F\cdot s

W=8.8\times 0.48 J

change in kinetic Energy =\frac{1}{2}mv^2-0

8.8\times 0.48=\Delta K.E.

K.E.-0=4.22

K.E.=4.22\ J

8 0
4 years ago
Other questions:
  • What is the best inference for the height of the plant after 35 hours?
    15·1 answer
  • ALWAYS use significant figure rules. Remember that these rules apply to all numbers that are measurements. A person walks along
    7·1 answer
  • Two crewmen pull a raft through a lock, as shown in the figure(Figure 1). One crewman pulls with a force of 130 N at an angle of
    14·1 answer
  • How are mixtures and pure substances related?
    7·1 answer
  • A flask that can withstand an internal pressure of 2500 torr, but no more, is filled with a gas at 21.0C and 758 torr and heated
    14·1 answer
  • A partly full paint can has 0.67 U.S. gallons of paint left in it. (a) What is the volume of the paint in cubic meters? (b) If a
    11·1 answer
  • As Earth travels in its ____, different constellations are visible at different times of the year.
    12·1 answer
  • 2. Two people, one on Earth and the other on the Moon, try and lift 200 kg blocks. Which person
    7·1 answer
  • 4 WILL GIVE YOU BRAINLIST
    10·2 answers
  • Jake is helping Fin push a box at a constant velocity up an incline that makes an angle of 30.0° above the horizontal by applyin
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!