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
neonofarm [45]
3 years ago
7

6. A 0.09 kg arrow hits a target at 22 m/s and penetrates 4 cm before stopping.

Physics
1 answer:
tatyana61 [14]3 years ago
8 0
A ) v = v o - a t
0 = 22 - a · t
a · t = 22
d = v o · t - a t²/2
0.04 = 22 t - 22 t / 2
0.04 = 11 t
t = 0.04 : 11 = 0.003636 s
a = 22 / t
a = 6050 m/s²
F = m · a = 0.09 kg · 6050 m/s²
F ( target→arrow) = - 544.5 N
b ) F ( arrow→target ) = 544.5 N
c )  If the speed was doubled:  v = 44 m/s;
F = a m
a = 6050 m/s²
a · t = 44
t = 6050 : 0.04
t = 0.007272 s
d = 44 t - 44 t/2 = 22 t
d = 22 · 0.007272
d = 0.16 m = 16 cm
You might be interested in
Prove law of conservation of energy for a stone moving vertically down ( explain energy at B & C )
STALIN [3.7K]

As per given condition of point B we can see that height at point B is "h/2" from the ground

So we know that potential energy is given as

U = mgh

so here we have to put height h = h/2

so potential energy is U = mgh/2

now for kinetic energy we need to find the speed of it after falling the distance h/2

now by kinematics we will have

v_f^2 - 0^2 = 2(g)(h/2)

now for kinetic energy

KE = \frac{1}{2}mv^2 = \frac{1}{2}m(gh)

KE = 1/2mgh

now total energy will be given as

E = mgh/2 + mgh/2 = mgh

now for point C we can say that it is the point near to ground

So here height is ZERO

now potential energy will also be zero

U = 0

now for kinetic energy we need to find speed

v^2 - 0^2 = 2(g)(h)

now kinetic energy

KE = \frac{1}{2}mv^2 = \frac{1}{2}m(2gh)

KE = mgh

now again we have total energy

E = 0 + mgh = mgh

6 0
4 years ago
Magnitude of u = 15, direction angle θ = 35° Magnitude of v = 18, direction angle θ = 60° Find the magnitude and direction angle
djverab [1.8K]

Answer:

32.225  and angle is 48.7 degree.

Explanation:

u = 15, θ = 35 degree

v = 18, θ = 60

First represent the u and v in vector form.

u = 15 (Cos 35 i + Sin 35 j ) = 12.287 i + 8.6 j

v = 18 ( Cos 60 i + Sin 60 j ) = 9 i + 15.6 j

The sum of the two vectors is given by

u + v = 12.287 i + 8.6 j + 9 i + 15.6 j = 21.28 i + 24.2 j

Magnitude of u + v = \sqrt{21.28^{2}+24.2^{2}} = 32.225

Let Ф be the angle

tan Ф = 24.2 / 21.28

Ф = 48.7 degree

5 0
3 years ago
BEFORE COLLISION
Zielflug [23.3K]

Anyways the answer is x=2
4 0
3 years ago
Read 2 more answers
What is the frequency of a wave that has a wave speed of 80m/s and a wavelength of 0.20m
IrinaK [193]

speed=frequency*wavelength, so frequency=speed/wavelength. frequency=80*0.2  

Frequency = 16 Hz

6 0
3 years ago
O A ring made up of equal semicircular section of cast inn and castutool with
irina1246 [14]

Answer:

hi weed DM weed TV TV DM

Explanation:

so en signal eddi

5 0
3 years ago
Other questions:
  • If I ride my bike to school, and I have to go up hills and turn corners, would my speed from home to school be measured with ins
    6·1 answer
  • Certain bacteria (such as Aquaspirillum magnetotacticum) tend to swim toward the earth’s geographic north pole because they cont
    10·1 answer
  • Which electromagnetic radiation can be seen with the human eye?
    8·1 answer
  • What is the capacity limitation of short-term memory?
    14·1 answer
  • Which two chemists organized elements based on properties such as how the elements react or whether they are solid or liquid
    7·2 answers
  • How do stars radius compare with their mass
    11·1 answer
  • Where is the centre of mass of a uniform cube located?​
    11·1 answer
  • Which diagram represents an open circuit?
    5·2 answers
  • Class 9 SCIENCE
    9·2 answers
  • A centrifuge consists of a container held at a distance of 0.20 m from its axis. When turned on, the centrifuge spins the contai
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!