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
son4ous [18]
3 years ago
9

A 50 kg child is sitting on a scale on the floor of an elevator. The elevator starts at rest and accelerates down at a rate of a

=−1 m/s2.Calculate the velocity of the elevator after 3 seconds.
Physics
1 answer:
morpeh [17]3 years ago
3 0

Answer:

v=m/s m=v.s -1*3= -3 meter/second

You might be interested in
a person hangs three pictures on the wall. the pictures all weigh the same. picture 1 and picture 2 are at the same height above
gulaghasi [49]
Picture 1 and 2 or am I wrong and it's not that obvious.
8 0
4 years ago
Read 2 more answers
A metal disk of radius 6.0 cm is mounted on a frictionless axle. Current can flow through the axle out along the disk, to a slid
Galina-37 [17]

Answer:

0.09 N

Explanation:

We are given that

Radius of disk,r=6 cm=\frac{6}{100}=0.06 m

1 m=100 cm

B=1 T

Current,I=3 A

We have to find the frictional force at the rim between the stationary electrical contact and the rotating rim.

dF=IBdr

dF=IBdr

\tau=rdF=IBrdr

\tau=\int_{0}^{R}IBr dr

\tau=IB(\frac{R^2}{2}

Torque due to friction

\tau=R\times F

Where friction force=F

R\times F=\frac{IBR^2}{2}

F=\frac{IBR}{2}

Substitute the values

F=\frac{3\times 1\times 0.06}{2}

F=0.09 N

7 0
3 years ago
A drawn bow possesses mechanical energy in the form of _______________. After the arrow is released, the energy is transformed i
natali 33 [55]

Answer:

potential energy, kinetic energy

Explanation:

6 0
3 years ago
Read 2 more answers
What is the definition of the half-life of a radioactive isotope?
Illusion [34]

Answer:Half-life is the amount of time it takes for the initial mass of the isotope to decompose, by half, into other lighter atoms.

Explanation:Different radioactive isotopes have different half-lives. For example, the element technetium-99m has a half life of 6 hours. This means that is 100 kg of the element is left to decay, in 6 hours, 50kg of the mass will have changed into other elements/atoms. The half-life of uranium-238 is 4.5 billion years while that of polonium-216 is only 0.145 seconds.

5 0
3 years ago
Read 2 more answers
Opposite meaning of rebel<br>​
RUDIKE [14]

Answer: Hello, The opposite of rebel is  supporter, adherent.

Explanation:

7 0
3 years ago
Other questions:
  • 1875 kg car is traveling at 22 m/s. It’s momentum is?
    5·2 answers
  • Which is the relationship between photon energy and the color of light?
    6·1 answer
  • What is the period of a wave if the frequency is? 5 Hz
    13·1 answer
  • What are scientific units for describing an object that is acclerating
    14·2 answers
  • Please help me and Can you show your work
    14·1 answer
  • Imagine that a machine enables you to do 100 joules of work with a force input of 20 newtons. Now imagine that a new machine is
    5·1 answer
  • QUIEN PA UN FREE .......................
    15·2 answers
  • When a resistor with resistance R is connected to a 1.50-V flashlight battery, the resistor consumes 0.0625 W of electrical powe
    9·1 answer
  • PLEASE HELP! Describe how you could use a negatively charged Van de Graaff generator to induce a positive charge on a previously
    15·1 answer
  • I have an algerbra 2 question.
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!