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
sashaice [31]
3 years ago
12

A 75 kg man standing in a lift notices that a as the lift rises, the scale reads 825 n. What is the acceleration of the lift?.

Physics
1 answer:
Leviafan [203]3 years ago
7 0

Answer:

mass=75kg

force=825n

we know,

force=acceleration×mass

or, 825=a×75

or,825/75=a

•°•a=11m/s^2

You might be interested in
A ball has a mass of 2 kg and is thrown with a force of 8 Newtons for .35 seconds. What is the ball's change in
Anna [14]

Answer:

1.4s

Explanation:

Given parameters:

Mass of ball  = 2kg

Force  = 8N

Time  = 0.35s

Unknown:

Change in velocity  = ?

Solution:

To solve this problem, we use the expression obtained from Newton's second law of motion which is shown below:

      Ft  = m(v  - u)

 So;

         Ft  = m Δv

F is the force

t is the time

m is the mass

Δv is the change in velocity

             8 x 0.35  = 2 x Δv

                  Δv  = 1.4s

6 0
3 years ago
Just need the answer
marin [14]

Answer:

1.  1, 2, 4 all show some form of refraction as the bending of a light ray when passing from one media to another.

Explanation:

Number 4 is the most accurate as it also shows some light being reflected and the bending of the refracted light ray in the correct direction for going from a medium of low refractive index (air) into a higher refractive index material (crown glass)

8 0
3 years ago
A skier is skiing down a slope on the mountain.
uysha [10]

The mechanical energy isn't conserved. Some energy is lost to friction.

Option A.

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

The mechanical energy is defined as the energy of a body which it achieves by virtue of its position and velocity. The mechanical energy are of two types - potential energy and kinetic energy. The potential energy is the energy of the body which it achieves by means of its relative position and is directly proportional to the height of the body from its relative plane. Whereas the kinetic energy of the body is achieved by virtue of its velocity and is directly proportional to the square of velocity of the body.

As the mountaineer is skiing down the slope of a mountain, the potential energy of the person is gradually changing into his kinetic energy. Had it been in an ideal situation, the potential energy lost would have been just equal to the kinetic energy gained by the person. But there's friction which opposes the speed of the body and reduces the velocity. Thus the kinetic energy will be lost to some extent and the energy won't be conserved.

4 0
3 years ago
How does deformation by drawing of a semicrystalline polymer affect its tensile strength?
Elenna [48]
This effect is explained by increased chain entanglements at higher molecular weights. Increasing the degree of crystallinity of a semicrystalline polymer leads to an enhancement of the tensile strength. Deformation by drawing increases the tensile strength of a semicrystalline polymer.
4 0
3 years ago
Which of the following simple machines is not properly identified? A. Scissors: lever B. Pizza cutter: wedge C. Screw: wheel and
GrogVix [38]

Pretty sure the answer is   C. Screw: wheel and axle

8 0
3 years ago
Other questions:
  • A rock at rest has weight 138 n. what is the weight of the rock when it is accelerating downward at 3.5 m/s2?
    14·1 answer
  • Why does alternating current change direction 50 to 60 times per second?
    10·2 answers
  • Fire trucks have the word FIRE written two ways, as seen here, on the front of the truck. Why is that?
    10·2 answers
  • A physical pendulum consists of a uniform solid disk (of radius R 2.35 cm) supported in a vertical plane by a pivot located a di
    10·1 answer
  • An environmental scientist performs research to discover what is in the solid
    13·2 answers
  • It's always safer to exercise in a gym.
    14·2 answers
  • Which of the following processes forms clouds A. Boiling B.Condensation C.Freezing D.Precipitation
    13·2 answers
  • Q5: An ice skater moving at 12 m/s coasts
    11·1 answer
  • Why was bowling one of the first racially integrated sports
    9·1 answer
  • Physics teacher guide grade 9​
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!