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
Alenkinab [10]
3 years ago
10

A man weighs 650 N. Inside a moving elevator, the floor exerts an upward force of 620 N on the man. What is the magnitude and di

rection of the man's acceleration?
Physics
2 answers:
nikitadnepr [17]3 years ago
6 0

Given that,

Weight of man, W= 650 N

Upward force by elevator, F= 620 N

a = ?

Since,

W = mg

m= W/g =650/9.81

m = 66.25 kg

Since,

F = ma

a = F/m

a = 620/66.25

a = 9.35 m/s²

Acceleration will be 9.35 m/s².

Since the force is in upward direction, it will accelerate the body in upward direction.

cestrela7 [59]3 years ago
3 0

Answer:Man's acceleration is 0.452 \frac{m}{s^{2}} in downward direction

Explanation:

<em>Weight of man, W= 650 N</em>

<em>Normal force exerted by floor of elevator , N= 620 N</em>

<em>Since weight , W = mg</em>

<em>mass m= \frac{W}{g}=\frac{650}{9.8}kg</em>

<em>Using Newtons 2nd law</em>

<em>W-N= ma     where a= acceleration of man in the downward direction</em>

=> 650-620=\frac{650}{9.8}kg\times a

=> a= 0.452 \frac{m}{s^{2}} <em>in downward direction </em>

You might be interested in
3. What is the mass of a paratrooper who experiences an air resistance of 400 N and an acceleration of 4.5 m/s2
goblinko [34]

Answer:

88.89kg

Explanation:

The formula for mass is m=F/a. If we plug in the values, we get m=400N/4.5m/s^2. The mass is 88.89kg. We know that the unit is in kg because one newton (N) is 1kg*m/s^2. The m/s^2 is cancelled out by the acceleration, and we are left with kg.

4 0
3 years ago
What temperature can a solar flare reach
balandron [24]
It reaches 10 or 20 million degrees kelvin but it can get as high as 10 million degrees kelvin
5 0
3 years ago
Which of the following is MOST useful to scientists in measuring the size of asteroids?
Alenkasestr [34]

Answer:c-The gravitational effect when spacecraft flies close to the asteriod

Explanation:

Gravitational effect on the spacecraft gives an estimate that how big is the asteroid by experiencing its gravitational pull.

The amount of extra thrust required to maintain the trajectory of the spacecraft during its motion hints at the scientist about the size of the asteroid.

Gravitational pull is directly proportional to the mass of object so greater the mass, greater will be the pull.

5 0
2 years ago
If a car travels 60 mph for a distance of 180 miles, how much time<br> did it take?
jolli1 [7]

Answer:

3 hours

Explanation:

180 divided by 60 (mph means miles per hours by the way)

6 0
3 years ago
What is it that lives if it is fed, and dies if you give it a drink?
Anna71 [15]

Fire is it that lives if it is fed, and dies if you give it a drink.

<h3><u>Explanation:</u></h3>

Fire is very essential part of human life. It is used for cooking food and for other important activities. Without fire we cannot not survive. Something or the other should be heated before consumption and this can be achieved only with fir. It is also used in the darker places for viewing many things around us.

Thus, fire can survive if we give fuel or any wooden pieces and when water is poured on it it will turn off. Hence Fire is the one that survives when it is fed and dies when water is given as a drink to it.

4 0
3 years ago
Other questions:
  • If a man walks 17m east and then 17m south , the magnitude of the man's displacement is
    15·2 answers
  • A hot air balloon has just lifted off and is rising at the constant rate of 1.60 m/s. suddenly, one of the passengers realizes s
    14·2 answers
  • Why might people be able to walk barefoot on hot coals of wood without burning their feet?
    16·2 answers
  • What two variables affect how loud you hear sound
    10·2 answers
  • If you could visit Pangaea, what animals would you most likely find there?
    8·2 answers
  • Which form of the law of conservation of energy describes the motion of the block when it slides from the top of the table to th
    9·1 answer
  • Using pressure and density of fluids.
    9·1 answer
  • For which planet is the length of the plants day longer than the planets year
    8·1 answer
  • If you know how to SHiFT in sleep how do you do it
    5·1 answer
  • Which resistors in the circuit are connected in parallel?
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!