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
DaniilM [7]
3 years ago
14

When jumping straight down, you can be seriously injured if you land stiff-legged. One way to avoid injury is to bend your knees

upon landing to reduce the force of the impact. A 73.0 kg man just before contact with the ground has a speed of 6.46 m/s. In a stiff-legged landing he comes to a halt in 2.07 ms. Calculate the average net force that acts on him during this time
Physics
1 answer:
Alex Ar [27]3 years ago
7 0

Answer:

Explanation:

The man comes to halt due to reaction force acting on him in opposite direction . If R be the reaction force

impulse by net  force = change in momentum

Net force = R - mg , mg is weight of the man .

( R-mg ) x 2. 07 x 10⁻³ = 73 x 6.46 - 0

R - mg = 227.81 x 10³

Average net force = 227.81 x 10³ N .

You might be interested in
It is desired to create a particle of mass 7920 MeV/c^2 in a head-on collision between a proton and an antiproton (each having a
Olegator [25]

Answer:

v=0.9714c

Explanation:

The kinetic energy possessed by  particles will be  

K.E=\frac{1}{2}Mc^2

where,

M is the mass of the particle (7920938.3 MeV/c²)

c is the speed of the light

Also,

energy of the proton particle = \frac{m_pc^2}{\sqrt{1-\frac{v^2}{c^2}}}

where,

v is the velocity

m_p is the mass of the proton (938.3 MeV/c²)

since the energy is equal

thus,

\frac{m_pc^2}{\sqrt{1-\frac{v^2}{c^2}}}=\frac{1}{2}Mc^2

or

1-\frac{v^2}{c^2}=[\frac{2m_p}{M}]^2

substituting the values in the above equation, we get

1-\frac{v^2}{c^2}=[\frac{2\times 938.3 }{7920}]^2

or

v=0.9714c

Hence,<u> the speed necessary for the specified condition to occur is </u><u>0.9714 times the speed of the light</u>

5 0
3 years ago
Which type of microscope would allow the viewer to see ribosomes inside a cell?
svlad2 [7]
Your answer would be : A transmission electron microscope
3 0
3 years ago
Read 2 more answers
The field around a solenoid is similar to the field around a bar magnet.<br><br> true or false?
OlgaM077 [116]
The answer would be true :)
8 0
3 years ago
Can somebody please help with these
Sever21 [200]

Answer:

Fusion

Fission

Explanation:

The first problem describes a nuclear fusion process. In this process;

  • small atomic nuclei combines to form a larger one.
  • it is accompanied by a large release of energy
  • this energy provides the needed temperature to set up another light nuclei to fuse.

The second problem describes nuclear fission,

  • a heavy nuclide is bombarded with a neutron.
  • the product formed becomes unstable and subsequently breaks down.
  • This leads to a series of chain reactions until stability is attained.
6 0
3 years ago
Suppose that a rectangular toroid has 2,000 windings and a self-inductance of 0.060 H. If the height of the rectangular toroid i
andrey2020 [161]

Answer:

0.01154 A

Explanation:

We have given the energy in the magnetic field U=4\times 10^{-6}J

Value of inductance L =0.060 H

Energy stored in magnetic field is given by U=\frac{1}{2}Li^2

i=\sqrt{\frac{2U}{L}}

i=\sqrt{\frac{2\times 4\times 10^{-6}}{0.06}}=0.01154\ A

So the current flowing through rectangular toroid will be 0.01154 A

3 0
3 years ago
Other questions:
  • What quantities are conserved in a nuclear transmutation
    10·1 answer
  • What is the 3d model of oxygen molecule​
    6·1 answer
  • A Canadian driving from Quebec to Montreal finds he has traveled 271 km. How many miles is this? There are 1.61 km in 1 mi
    5·1 answer
  • Describe what are sex cells?
    9·1 answer
  • Ideal Meters Problem. What internal resistance is ideal for a voltmeter? What internal resistance is ideal for an ammeter?
    14·1 answer
  • A sled weighing 300 N is moved at constant speed over a horizontal floor by a force of 50 N applied parallel to the floor
    14·1 answer
  • If we know the mass of an object in kilograms, and we know the
    15·1 answer
  • Science Will give brainless and 22 points
    5·2 answers
  • Claim A: More potential energy can be stored by moving against the magnetic force of a stronger magnet.
    6·1 answer
  • The international Space Station (ISS) orbits the Earth once every 90 mins at an altitude of 409 km. How high would it have to be
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!