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
chubhunter [2.5K]
3 years ago
8

An archer fires and arrow while standing atop a 5.15 m tall wall. The arrow is fired at an angle of 55 degrees and has a launch

velocity of 52.4 m/s. (This is the actual launch velocity for English Longbows!) a. What is the time of flight for the arrow?
b. How far from the wall does the arrow strike the ground?
Physics
1 answer:
il63 [147K]3 years ago
8 0

Answer:

Explanation:

Given

height of wall=5.15 m

angle of launch(\theta )=55^{\circ}

Launch velocity(u)=52.4 m/s

Time of flight will be sum of time of flight of projectile+time to cover 5.15 m

Time of flight of arrow=\frac{2usin\theta }{g}

t=\frac{2\times 52.4\times sin55}{9.81}=8.76 s

Now time require to cover 5.15 m

Here at the time of zero vertical displacement of arrow i.e. when arrow is at the same height as of building then its vertical velocity will change its sign compared to initial vertical velocity.

v_y=-52.4sin55 at zero vertical displacement

Thus time required will be t_2

5.15=52.4sin55\times t+\frac{gt^2}{2}

4.9t^2+42.92t-5.15=0

t=0.118 s i.e. t_2=0.118 s

total time =t_1+t_2=8.76+0.118=8.878 s

(b)Horizontal distance=Range of arrow(R_1) + horizontal distance in 0.118 s(R_2)

R_1=\frac{u^2sin2\theta }{g}=\frac{52.4^2\times sin110}{9.8}=263.28 m

R_2=52.4cos55 \times 0.118=3.546 m

R=R_1+R_2=263.28+3.546=266.82 m

You might be interested in
A box with a mass of 50 kg is raised straight up. What is the force of the box?
8_murik_8 [283]

Answer:

A box with a mass of 50 kg is raised straight up. What is the force of the box? plss help!! two types exist-positive and negative. possible answers: A- electric current B- repel C- lines of force D- charges. Five wavelengths are generated every 0.100 s in a tank of water.

Explanation:

I hope it helped

3 0
2 years ago
An engineer in India (standard household voltage = 220 volts) is designing a transformer for use on her
Gnom [1K]
He should a step-up transformer with k=220/120=1.83 so output coil must have 240*1.83=440 turns

5 0
3 years ago
A 6 V battery is connected to a 24 ohm resistor to create a circuit. The 6 V battery is then replaced with a 12 V battery. How d
11Alexandr11 [23.1K]

Answer:

1.) The current is doubled

2.) moving a magnet up and down near the wire

3.) An electric current in the wire produces a magnetic field.

4.) Distance between Particles (m)

Explanation:

1.) When 6 V battery is connected to a 24 ohm resistor to create a circuit, using ohms law, V = IR

Current I = 6/24 = 0.25 A

When the The 6 V battery is replaced with a 12 V battery,

Current I = 12/24 = 0.5 A

Therefore, The current is doubled

2.) Electric current will be induced when moving a magnet up and down near the wire

3.) An electric current in the wire produces a magnetic field.

4.) Distance between Particles (m)

The force of attraction between two different masses is inversely proportional to the square of the distance between them.

6 0
4 years ago
______ states that energy cannot be created or destroyed.
Pavel [41]
The answer is a newton second law
4 0
3 years ago
Read 2 more answers
Someone help me please
ivanzaharov [21]
C. cooked noodles and water
because noodles are long and water has no shape or size.
if you have any problems with this answer,
comment and I will fix it.
Thank s!
6 0
3 years ago
Other questions:
  • explain what happens when two light waves traveling from the same direction of displacement meet. (at least one paragraph.)
    5·2 answers
  • A force of 7.0 N acts on a block of wood at an angle of 50 degrees above the horizontal as the block moves a distance of 6.4 met
    9·1 answer
  • The world record for a 100 m race is 10.44 m/s. How fast is this in mi/h?
    6·1 answer
  • What is the magnitude of the detected sound frequency shift from 170 Hz during the projectile flight described in the passage?
    9·1 answer
  • A student throws a water balloon vertically downward from the top of a building. The balloon leaves the thrower's hand with a sp
    8·1 answer
  • Suppose you have a pendulum clock which keeps correct time on Earth(acceleration due to gravity = 1.6 m/s2). For ever hour inter
    5·1 answer
  • Explain how high-pressure and low pressure systems are different
    14·1 answer
  • Two point charges, the first with a charge of 4.47 x 10-6 C and the second with a charge of 1.86 x 10-6 C, are separated by 17.4
    11·2 answers
  • WhT is marasmus my followers and following pls give answer in detail ​
    12·2 answers
  • Question 1:
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!