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
artcher [175]
3 years ago
14

You are sitting on a deck of your house surrounded by oak trees. You hear the sound of an acorn hitting the deck. You wonder if

an acorn will do much damage if instead of the deck it hits your head. Let the mass of the acorn be 3.5 g. Suppose it drops from a height of 14 m (relative to your head). Assume that the acorn sinks in 0.50 cm of your head skin before coming to a stop.
Physics
1 answer:
Black_prince [1.1K]3 years ago
8 0

Answer: 96N

Explanation:

To calculate the velocity of the impact On the persons head, we have

h = gt²/2

14 = 9.81t²/2

t² = 28/9.8

t² = 2.86

t = 1.69s

V = u + at

V = 0 + 9.81*1.69

V = 16.58m/s

a(average) = (v1² + v2²) /2Δy

a(average) = 16.58² + 0)/2 * 0.005

a(average) = 274.8964/0.01

a(average) = 27489.64m/s²

Using newton's second law of motion,

F(average) = m * a(average)

F(average) = 0.0035 * 27489.64

F(average) = 96.21N

Therefore the force needed by the acorn to do much damage starts from 96N

You might be interested in
BERE
Kisachek [45]

Answer:

All points to the left of zero are negative

Explanation:

6 0
2 years ago
Read 2 more answers
A _____ is NOT a compound machine.
UNO [17]

A bolt, all these besides bolt are a combo of simple machines

6 0
3 years ago
Read 2 more answers
A brick sits on the top of a hill with a gravitational potential energy of 245 J. To determine the gravitational potential of th
Bogdan [553]

Answer:

The mass of the object, its acceleration due to gravity and the distance between the top of the hill and the ground level.

Explanation:

gravitational potential energy is the energy possessed by a body under influence of gravitational force by virtue of its position.

In order to determine the gravitational potential energy of the brick, we must know the mass (m) of the brick, its acceleration due to gravity (g) since it is acting under the influence of gravitational force and the distance between the top of the hill and the ground level. (The height).

Potential energy of a body is calculated as mass × acceleration due to gravity × height.

5 0
3 years ago
Increase the slit width to 1050 nm. What happens to the width of the central bright fringe? (Always remember to wait a few secon
djyliett [7]

Answer:

b.

Explanation:

In case of Single Slit, diffraction will occur.

Then In Single slit Diffraction, width of central fringe is

x_c= 2D\lambda/a


where D= distance b/w screen and slit

a= slit width

\lambda = wavelength

Thus if Screen width increases keeping other factors same then width of central fringe becomes narrower as

x_c\propto 1/a

On increasing the slit width the central bright fringe width The width of the central bright fringe becomes narrower.

3 0
3 years ago
If you take a deep breath of air, you can float more easily in water because you have _____.
Leni [432]

Answer:

the answer is c

6 0
3 years ago
Read 2 more answers
Other questions:
  • Which planet revolves around the sun in less time than in rotates around its axis?
    13·2 answers
  • Density is the ratio of an object’s mass to its volume. would you expect density to be a vector or a scalar quantity? explain.
    5·1 answer
  • What is the purpose of the overrunning clutch in the starter drive?
    12·1 answer
  • How does altitude, distance from the ocean, amount of sunlight, distance from the equator, and ocean currents affect polar clima
    12·1 answer
  • Can someone help me PLEASE? I need to finish this because I have more homework and I need to go to bed
    7·1 answer
  • Mrs. Drover is able to see the taxi driver because of the aperture, or
    11·1 answer
  • Leash a block of 0.5 kg down the entire length of an inclined plane forming a name of 37 ° with the horizontal. Friction with th
    10·1 answer
  • Select all that apply. A vector always consists of _____. size velocity distance direction
    11·2 answers
  • What is the difference between transverse and longitudinal waves? Transverse waves always travel at smaller speeds than do longi
    15·1 answer
  • What is the momentum of a child and a bicycle if the total mass of th
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!