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
Iteru [2.4K]
3 years ago
14

A 70kg man is moving with a speed of 3.2 m/s on a rough surface, his speed was decreasing uniformly until he reaches to a stop b

ecause of the friction of the rough surface. Calculate the friction force exerted on the man.​
Physics
1 answer:
VMariaS [17]3 years ago
6 0

Answer:

224 N

Explanation:

You might be interested in
Tom is sitting facing forward in the train as it is getting ready to leave the station. He puts a smooth ball on the train floor
Vesnalui [34]

According to Newton's first law of motion, what happens to the ball is  the ball rolls backward.

<h3>What is the first law?</h3>

This means that an object at rest or in motion will remain uniformly rectilinear and tend to be in that state if the net force on it is zero.

In this case, we have to think that the ball is at rest and the train is moving with a velocity that way, the reaction of the ball will be to go in the opposite direction to the motion.

See more about  first law at brainly.com/question/3808473

#SPJ1

8 0
2 years ago
Whats the answer to this question show in the picture 2 questions
astraxan [27]

1) D

2) I would say A, but not 100%, its the only one that makes sense tho

3 0
3 years ago
Read 2 more answers
Heat causes water molecules to expand
weeeeeb [17]

Answer:yes because of increase of intermolecular space

Due to increase in heat

4 0
3 years ago
The energy required to dislodge electrons from cesium metal via the photoelectric effect is 207 kJ/mol . What wavelength (in nm)
ki77a [65]

Answer:

So wavelength in nm will be \lambda =0.956\times 10^{-19}nm    

Explanation:

We have given that the energy = 207 KJ/mol =207\times 10^3j/mol

Speed of light c=3\times 10^8m/sec

Plank's constant h=6.6\times 10^{-34}J-s

According to plank's rule energy of the photon is given by

E=\frac{hc}{\lambda }

207\times 10^3=\frac{6.6\times 10^{-34}\times 3\times 10^8}{\lambda }

\lambda =0.956\times 10^{-28}m

So wavelength in nm will be \lambda =0.956\times 10^{-19}nm

6 0
3 years ago
A 73 kg swimmer dives horizontally off a 462 kg raft initially at rest. If the diver's speed immediately after leaving the raft
murzikaleks [220]

Answer:

Corresponding raft speed = -0.875 m/s (the minus sign indicates that the raft moves in the direction opposite to the diver)

Explanation:

Law of conservation of momentum gives that the momentum of the diver and the raft before the dive is equal to the momentum of the diver and the raft after the dive.

And since the raft and the diver are initially at rest, the momentum of the diver after the dive is equal and opposite to the momentum experienced by the raft after the dive.

(Final momentum of the diver) + (Final momentum of the raft) = 0

Final Momentum of the diver = (mass of the diver) × (diving velocity of the diver)

Mass of the diver = 73 kg

Diving velocity of the diver = 5.54 m/s

Momentum of the diver = 73 × 5.54 = 404.42 kgm/s

Momentum of the raft = (mass of the raft) × (velocity of the raft)

Mass of the raft = 462 kg

Velocity of the raft = v

Momentum of the raft = 462 × v = (462v) kgm/s

404.42 + 462v = 0

462v = -404.42

v = (-404.42/462) = -0.875 m/s (the minus sign indicates that the raft moves in the direction opposite to the diver)

Hope this Helps!!!

5 0
3 years ago
Other questions:
  • 1. What is the potential energy of a 4-kilogram potted plant that is on a 1 meter-high plant
    5·1 answer
  • Why evaporation are called surface phenomenon?
    11·2 answers
  • What is the energy in joules of a mole of photons associated with red light of wavelength 7.00 × 102 nm?
    8·1 answer
  • The amount of light a star gives off is called its.....
    5·1 answer
  • a plane is flying due east in still air at 395 km/h. suddenly, the plane is hit by wind blowing at 55km/h toward the west. what
    13·1 answer
  • Disadvantage of intrapreneurship​
    14·1 answer
  • Dos bolas, de masas mA = 40 g y mB =60 g, esta?n suspendidas como se observa en la figura. La bola ma?s ligera se jala en un a?n
    7·1 answer
  • A man walks 30 meters north,then 90 meters east, and then 30 meters south​
    11·1 answer
  • All objects in our solar system orbit the Sun. How is the movement of planets like
    12·1 answer
  • True or false your vocal cords act like a guitar string when it comes to sound
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!