A child’s toy arrow is launched horizontally from a bow at a speed of 8 m/s from a second story window 4 meters above the ground, and the sticks in a pile of sand.

A. How far away is the pile of sand?

B. What were the horizontal and vertical speeds of the arrow when it hits the sand?

C. What angle does the arrow make with the ground when it sticks in the sand?

Answers

Answer 1

First find the time it takes to hit the sand t
using s=1/2 g t^2
t^2= 8/9.8= 0.82 seconds
This means the sand was s = 8 * 0.82 = 6.5m away
The horizontal speed stays constant at 8 m/s
The vertical speed =.82 * 9.8 = 8.0 m/s
As the two velocities are equal the angle must be 45 degrees to the horizontal

Related Questions

To study the dependant variable, a scientist must A. manipulate the independent variable B. have more than one control group C. manipulate the dependent variable D. have more than one experimental group

Answers

Answer:

Explanation:

Answer:

A. manipulate the independent variable

1 a rectangular block of steel measures 4cm * 2cm* 1.5cm. its mass is 93 .6g

a) calculate the density of steel

b)steel is made up of almost entirely of atoms butt is denser than iron

suggest a reason for this

Answers

a) density = 93.6g/12cm³

= 7.8g/cm³

b) The reason is alloying

Explanation:

volume of the rectangular block = l× b × h

= (4 × 2 × 1.5)cm

= 12 cm³

density = mass/ volume

mass = 93.6g

volume = 12cm³

therefore,

density = 93.6g/12cm³

= 7.8g/cm³

b) °Steel is formed when alloying Iron with carbon.

°Alloying improves the physical properties of the metals and non-metals

a hypothesis is
a- an experiment
b - a question
c - an educated guess ( an ' inference ;)
d - a conclusion

Answers

Answer:

D a conclusion

Explanation:

The definition of hypothesis is a supposition or proposed explanation made on the basis of limited evidence as a starting point for further investigation

is c an educated guess because is a guess of what might happen in the experiment

An object traveling at a constant velocity has no net force. True or False

Answers

The answer is False

Hope this helps

The density of water is 1.00 g/cm3. The density of ethanol is 0.80 g/cm3. What is the volume of ethanol, in cm3 that has the same mass as 100 cm3 of water?

Answers

Explanation:

Given that,

The density of water is 1 g/cm³

The density of ethanol is 0.8 g/cm³

We need to find the volume of the ethanol that has the same mass as 100 cm³ of water.

Density=mass/volume

For water,

[tex]d=\dfrac{m}{V}\\\\m=dV\\\\m=1\ g/cm^3\times 100\ cm^3\\\\m=100\ g[/tex]

For ethanol,

[tex]d=\dfrac{m}{V}\\\\V=\dfrac{m}{d}\\\\V=\dfrac{100\ g}{0.8\ g/cm^3}\\\\V=125\ cm^3[/tex]

Hence, 125 cm³ of ethanol has the same mass as 100 cm³ of water.

Answer:

1.00 g/cm3

Explanation:

What are the properties of a photon?

Answers

Answer:

Properties of a photon would be:

does not have a electric chargedoes not have a massphotons are stableknown to carry energy

Explanation:

Remember that photons are a quantum of light that carry energy while having no mass, they're used mainly in cameras and in other machinery that helps emit radiation.

Hope this helps.

the volume of a cube is 64 meter cubic. what is the length of the side of the cube?

Answers

16. each side length will be 16

A car is moving at 18 m/s when it accelerates at 8 m/s2 for 2 sec. What is his new velocity ?

Answers

Vf= at + Vi
Since at = 8m/s2 * 2 = 16m/s2
Vi=18m/s
=>Vf = 16m/s2 + 18m/s = 34m/s
So, the new velocity is 34m/s

2. Kymel is competing to see who is the fastest runner on the football team. Kymel uns
from rest to a speed of 4 m/s when he reaches the 20 meter mark in just 2 minutes.
What was Kymel's acceleration during the run?
a. 2 m/s2
b. 30 m/s2
c. 0.5 m/s2
d. 0.03 m/s2
PsX

Answers

Answer:

Explanation:

I just really need points man sorry

A 350 kg motorcycle moves with a velocity of 30 m/s. What is its kinetic energy?
10500 Joules
c. 31500 Joules
b. 157500 Joules
d. 900 Joules

Answers

Answer:

C 31500

Explanation:

1/2mv*2=KE

k.e= 350× (30)*2

=350×900

k.e= 31500

It is d because you have to do 300 - 50 then take of the zero for 30.After that do 3x300 and you get 900

answer these questions plz

Answers

1. The property of a conductor by virtue of which it posses the flow of electric current through it is called resistance.

2. The resistance of a conductor depends on the cross sectional area of the conductor and it's resistivity.

3.This id due to the fact that the resistance of a wire is inversely proportional to the square of its diameter.

4.Due to at high temperatures , the alloy donot oxidize. Alloy doesn't melt readily and get deformed.

Help please like I mentioned before I suck at physics

Answers

.20 m/s is the answer

Answer:

.20 m/s

Explanation:

hope it helps

The force of something stronger than the muscles causes it to increase its tension as it
gets longer.

False
True

Answers

The answer is trueI just Finnishd

The force of something stronger than the muscles causes it to increase its tension as it gets longer is true.

What is force?

A force is an effect that can alter an object's motion according to physics. An object with mass can change its velocity, or accelerate, as a result of a force. An obvious way to describe force is as a push or a pull. A force is a vector quantity since it has both magnitude and direction.

Frictional force allows the ball to stay in the hand while muscular force is employed to stop the motion of the ball during catching. Throughout this activity, the Earth's gravitational pull on the ball is constant.

The force of something stronger than the muscles causes it to increase its tension as it gets longer is true.

To learn more about force refer to the link:

brainly.com/question/13191643

#SPJ2

Define Fundamental unit and Derived Unit

Answers

Fundamental can not be broken down to anything simpler ( Kg, m , s, etc)

Derived can be broken down to simpler, fundamental units

what is the average velocity of a car that travels 30 kilometers due west in 0.50 hour

Answers

Divide the distance traveled (0.30 km) by the travel time (0.50 hrs) and get the speed in km/hr. The direction is due west. 60 km/hr west

The average velocity of a car that travels 30 kilometers due west in 0.50 hour - 60 km/hour west.

Average velocity is the displacement of an object with the time change. To find the average speed of an object we divide the distance travelled by the time elapsed.

Velocity is a vector quantity and average velocity can be found by dividing displacement by time.Average velocity is defined as the change in position or displacement (∆x) divided by the time intervals (∆t) in which the displacement occurs

Average velocity = ∆x/∆t

Then,

average velocity = 30/0.5

= 300/5

= 60

Thus, the correct answer would be - 60 km/hour west.

Learn more about:

https://brainly.com/question/862972

Calculate the volume of the following: (V=lwh)
A rectangular prism that is 10.0cm long, 4.0 cm wide, and 2.0 cm high.

Answers

Answer:

V= 80 cm^3

Explanation:

V= 10 * 4* 2

V= 80 cm^3

Alan travels 100 km in 5hrs. Find his average speed in km/h

Answers

25 km/h hope this helps

Answer:

The answer is 20 km/hr

Explanation:

The average speed of an object given the time and distance covered can be found by using the formula

[tex]a = \frac{d}{t} \\ [/tex]

where

d is the distance

t is the time

From the question

d = 100 km

t = 5 hrs

We have

[tex]a = \frac{100}{5} \\ [/tex]

We have the final answer as

20 km/hr

Hope this helps you

You are driving a car and are at a stop light. When the light turns green, you
step on the gas and accelerate at 6.Omi/hr2. Your final speed is 60 miles per
hour (mi/hr or mph). How much time did it take you to get to your final speed?

Answers

Answer:

t= 10 hr

Explanation:

v(final)=v(initial)+at

60 mi/hr= 0 mi/hr+ (6 mi/hr2)t

(60 mi/hr)/(6 mi/hr2)=t

t= 10 hr

What is the name of the convection
current in the atmosphere that cycles
between the equator and 30° N and
30° S?

Answers

Answer:

Hadley cells

Explanation:

Formation of Convection Currents

Atmospheric convection currents are global patterns of air movement that are initiated by the unequal heating of Earth. Hadley cells- the convection currents that cycle between the equator and 30˚ north and south.

Other Questions

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