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
zvonat [6]
3 years ago
10

The weight of a standard object defined as having a mass of exactly 2.9 kg is measured to be 28.449 n. in the same laboratory, a

second object weights 48.7 n. what is the mass of the second object? answer in units of kg
Physics
2 answers:
Murljashka [212]3 years ago
7 0
If the units is expressed in terms of Newtons, that's a unit of force. The relationship between force and mass is Newton's Second Law of Motion.

F = ma

In this case, a is the acceleration due to gravity. Let's solve a first.

28.449 N = (2.9 kg)(a)
a = 9.81 m/s²

We use this to find the m of the second case.
F = ma
48.7 N = m(9.81 m/s²)
<em>m = 4.96 kg</em>
PtichkaEL [24]3 years ago
4 0
Mass of the object m = 2.9 kg 
Force F1 = 28.449 N 
F1 = m1 x a => a = F / m => 28.449 / 2.9 => a = 9.81, which is gravitational acceleration. 
In the same lab, a = g = 9.81, second object F2 = 48.7N = m2 x a 
m2 = F2 / a => 48.7 / 9.81 => m2 = 4.96 kg 
Mass of the second object m2 = 4.96 kg
You might be interested in
The great limestones caverns were formed by dripping water. If water droplets of 10 ml fall from a height of 5 m at a rate of 10
loris [4]

The average force of the water droplets is the force given by the impact

per second of the droplets on the limestone floor.

  • The average force exerted on the limestone floor is approximately <u>1.6013 × 10⁻² N</u>

Reasons:

The given parameters are;

Volume of a droplet = 10 ml = 1 × 10⁻⁵ m³

Height from which the water falls, <em>h </em>= 5 meters

Rate at which the water falls = 10 per minute

Required:

The average force exerted on the floor by the water droplets.

Solution:

According to Newton's Second Law of motion, we have;

Force = Rate of change of momentum

Momentum = Mass × Velocity

Mass of a droplet of water = Volume × Density

Density of water = 997 kg/m³

Mass of a droplet = 1 × 10⁻⁵ m³ × 997 kg/m³ = 0.00997 kg

The velocity just before the droplet reaches the ground, v = √(2·g·h)

Where;

g = Acceleration due to gravity ≈ 9.81 m/s²

Which gives;

v = √(2 × 9.81 m/s² × 5 m) ≈ 9.905 m/s

The rate of change in momentum per minute = 1

Therefore;

\displaystyle The \ rate \ of \ change \ in \ momentum = Average \ force = \mathbf{\frac{\Delta Momentum }{\Delta Time}}

ΔMomentum = Mass × ΔVelocity

Considering the 10 drops per minute, we have;

ΔMomentum = 10 × 0.0097 kg × 9.905 m/s = 0.960785 kg·m/s

ΔTime = 1 minute = 60 seconds

Therefore;

\displaystyle Average \ force, \, F_{ave}  \frac{0.960785 \, kg\cdot m/s }{60 \, s} \approx =\mathbf{1.6013 \times 10^{-2} \, N}

  • The average force exerted on the limestone floor by the droplets of water is F_{ave} ≈ <u>1.6013 × 10⁻² N</u>

Learn more about Newton's Second Law of motion and force exerted water here:

brainly.com/question/3999427

brainly.com/question/4197598

3 0
2 years ago
A simple motor converts ________energy into________energy.
k0ka [10]
I think it is C. I hope I helped.
8 0
3 years ago
Read 2 more answers
How tightly does mass need to be compacted in order to become a black hole??? (2 words)
olga55 [171]

is it infinite density?

8 0
3 years ago
According to the Theory of Plate Tectonics, which of the following statements is correct?
kramer

Answer:

It's D. The geothermal energy from Earth's core loses most of its heat before reaching the outer layer. The plates on the outer layer have been proven to be moving due to evidence such as earthquakes, volcanic eruptions, and tsunamis.

Explanation:

8 0
3 years ago
Can the volume of a gas be measured?
Scilla [17]

Answer:

C. Just measure the volume of the container it is in

Explanation:

Another why of measuring the volume of gas is by filling a contractor with water then in invert a glass jar air will miss place the space taken by water then measure the volume of water misplaced to get the volume to air

5 0
2 years ago
Other questions:
  • A student pulls a box across a horizontal floor at a constant speed of 4.0 meters per second by exerting a constant horizontal f
    10·2 answers
  • What are the magnitude and direction of the force the pitcher exerts on the ball? (enter your magnitude to at least one decimal
    15·2 answers
  • Which was the first object made by humans to orbit earth?
    14·1 answer
  • An arrow is shot at 27.0° above the horizontal. Its velocity is 54 m/s, and it hits the target.
    8·1 answer
  • Firecracker A is 300 m from you. Firecracker B is 600 m from you in the same direction. You see both explode at the same time. D
    6·1 answer
  • A diffraction grating with 270 lines per mm is used in an experiment to study the visible spectrum of a gas discharge tube. 1. A
    14·1 answer
  • ILL GIVE BRAINLIEST. plsss help asap
    13·1 answer
  • Considera los objetos A y B con una masa de 400g cada uno y ambos a una temperatura de 25°C. Si el calor específico de A es mayo
    11·1 answer
  • 7. Explain why observations of comets and shooting stars presented challenges to ancient astronomers using
    9·1 answer
  • A 9-volt battery is used to power two lightbulbs in a series circuit. The first light bulb has a
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!