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
Alenkasestr [34]
3 years ago
7

An object is hung from a spring balance attached to the ceiling of an elevator cab. The balance reads 65 N when the cab is stand

ing still. What is the reading when the cab is moving upward (a) with a constant speed of 7.6 m/s and (b) with a speed of 7.6 m/s while decelerating at a rate of 2.4 m/s2
Physics
1 answer:
lana66690 [7]3 years ago
7 0

Answer:

(A) Reading will be 65 N

(B) Net force on the elevator will be 49.076 N    

Explanation:

We have given the balance force = 65 N

Acceleration due to gravity g=9.8m/sec^2

We know that W=mg

So 65=m\times 9.8

m = 6.632 kg

(a) In first case as the as the speed is constant so the force on the elevator will be 65 N

(B) In second case as the elevator is decelerating at a rate of 2.4m/sec^2

So net acceleration = 9.8-2.4=7.4m/sec^2

So net force on elevator will be = m× net acceleration = 6.632×7.4 = 49.076 N

You might be interested in
1. A 46000N helicopter feels a net force of 9200N. What litt force is exerted by the air on the propellers?
Lina20 [59]

Answer:

Force exerted by the air on the propellers = 46000 - 9200

= 36800 N

Hope this helps!

4 0
3 years ago
Diffrence between vector and scalar
Rama09 [41]

Answer:

Vector has a direction and a magnitude, scalar only has a magnitude

Explanation:

5 0
3 years ago
You are wearing earbuds or headphones to listen to your music but your family members can hear it as well. They tell you that it
allsm [11]

If it’s loud enough for your family to hear it, it’s best you turn it down. It could cause permanent damage to your ear drums if it’s loud enough and you could start to lose your hearing. So if your family were to tell you to turn it down, you should probably just turn it down!

5 0
3 years ago
The instantaneous velocity of an object is the blank of the object with a blank
777dan777 [17]
The instantaneous velocity of the object is its speed and direction at that instant.
7 0
3 years ago
Read 2 more answers
Just the the moon seems to shine and the two below it.
katrin [286]
The first one is revolves
5 0
2 years ago
Other questions:
  • A plane travels 1000 miles in 5 hours .what is the planes average speed?
    13·2 answers
  • To find original research in animal disease prevention, it would be best to consult a/an
    12·1 answer
  • What is the tangential velocity at the edge of a disk of radius 10cm when it spins with a frequency of 10Hz? Give your answer wi
    15·1 answer
  • 60 POINTS ANSWER CORRECTLY
    13·2 answers
  • A model rocket is launched straight upward with an initial speed of 57.0 m/s. It accelerates with a constant upward acceleration
    14·1 answer
  • The minimum stopping distance for a car traveling at a speed of 30 m/s is 60 m, including the distance traveled during the drive
    10·1 answer
  • It took an American football lineman 14 seconds to complete 10 repetitions of a 102 kg bench press. If the bar had to travel 1.4
    12·1 answer
  • A 62.0 kg sprinter starts a race with an acceleration of 1.44 m/s2. If the sprinter accelerates at that rate for 30 m, and then
    11·1 answer
  • What is a benefit of a medically supervised rehabilitation program?
    8·1 answer
  • What is the name of the process that plants use to remove carbon dioxide from the atmosphere?
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!