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
vfiekz [6]
3 years ago
12

An object whose mass is 3 kg is fired from an artillery cannon, giving it a forward momentum of 1050 kg•m/s . What is its veloci

ty?
Physics
1 answer:
Yuki888 [10]3 years ago
7 0

<u>Given</u><u> </u><u>:</u><u>-</u>

  • Mass of the object is 3kg .
  • Its momentum is 1500kg m/s

<u>To </u><u>Find</u><u> </u><u>:</u><u>-</u>

  • Its velocity .

<u>Solution</u><u> </u><u>:</u><u>-</u>

As we know that , the amount of motion contained in a body is called momentum . Mathematically ,

\sf\twoheadrightarrow Momentum = mass * velocity\\\\

\sf\twoheadrightarrow 1500kg\ m/s = 3kg * v\\\\

\sf\twoheadrightarrow v =\dfrac{1500kg\ m/s}{3kg}\\\\

\sf\twoheadrightarrow \underline{\underline{\blue{ velocity = 500m/s}}}

You might be interested in
A car travels 240km in 4h what’s the cars velocity
Tresset [83]

The car's speed is 240km/4hr= 60km/hr.

There's not enough information given in the question to determine its velocity.

6 0
3 years ago
Read 2 more answers
When conduction electrons pass through a device with resistance, which describes their energy?
Aleksandr-060686 [28]

Answer:

a) their potential energy increases.

Explanation:

Ohm's Law is

R= V/I

Where R= Resistance

V= potential difference or potential energy

I= current or conduction electron flow rate

Clearly R and V are directly proportional i-e Potential energy increases with resistance.

3 0
3 years ago
A 3.0-kg block starts at rest at the top of a 37° incline, which is 5.0 m long. Its speed when it reaches the bottom is 2.0 m/s.
Mama L [17]

Answer: f_{r} = 16.49N

Explanation: The object is placed on an inclined plane at an angle of 37° thus making it weight have two component,

W_{x} = horizontal component of the weight = mgsinФ

W_{y} = vertical component of weight = mgcosФ

Due to the way the object is positioned, the horizontal component of force will accelerate the object thus acting as an applied force.

by using newton's law of motion, we have that

mgsinФ - f_{r} = ma

where m = mass of object=5kg

a = acceleration= unknown

Ф = angle of inclination = 37°

g = acceleration due to gravity = 9.8m/s^{2}

f_{r} = frictional force = unknown

we need to first get the acceleration before the frictional force which is gotten by using the equation below

v^{2} = u^{2} + 2aS

where v = final velocity = 2m/s

u = initial velocity = 0m/s (because the object started from rest)

a= unknown

S= distance covered = length of plane = 5m

2^{2} = 0^{2} + 2*a*5\\\\4= 10 *a\\\\a = \frac{4}{10} \\a = 0.4m/s^{2}

we slot in a into the equation below to get frictional force

mgsinФ - f_{r} = ma

3 * 9.8 * sin 37 - f_{r} = 3* 0.4

17.9633 - f_{r} =  1.2

f_{r} = 17.9633 - 1.2

f_{r} = 16.49N

4 0
4 years ago
A spring that has a spring constant of 1400 N/m is stretched to a length of 2.5 m. If the normal length of the spring is 1.0 m,
Daniel [21]
The answer is 1575, I just took the Review.<span />
7 0
4 years ago
how could you prove to a skeptic that the beats are an interference effect that requires both sound sources? test out your metho
podryga [215]

Beats are interference patterns between two tones of different frequencies. To prove the skeptic first, play the recorded audio as there are no beats in it. Now take two sound sources with different frequencies. When both sources are turned on, we hear notes that rise and fall at equal intervals. That's what's called beats.

A frequency beat occurs when two waves with different frequencies overlap, causing alternating cycles of constructive and destructive interference between the waves.

When we tap the table with our finger, then put our ear to the table, and tap the table surface as far as 30 cm from our ear. Then the sound of beats on the table will sound louder when we put our ears on the table. So, it can be concluded that solid objects can conduct sound better than air. This is because the molecules or particles of solid objects are denser than air.

Learn more about the beat's frequency at brainly.com/question/14157895

#SPJ4

7 0
1 year ago
Other questions:
  • A cannonball is launched from the ground at an angle of 30 degrees above the horizontal and a speed of 30 m/s. Ideally (no air r
    12·1 answer
  • How are surface temperature and length of year on a planet related to the planet’s distance from the Sun?
    12·1 answer
  • A conglomerate is a rock that forms as a result of _____. . . Choices:Intense heat and pressure. Compaction and cementation. Rap
    8·2 answers
  • Which statement about gravity is true? L
    10·1 answer
  • a beaker has mass of 125 g. what is the mass of liquid if the beaker plus liquid have a mass of 232 g?
    5·1 answer
  • According to the electromagnetic spectrum,
    11·2 answers
  • You have to use 4 N of force to lift a 36 N object with a lever. The lever has an effort arm of 45 m. What is the load arm lengt
    11·1 answer
  • classify the following elements as halogens alkali metals alkaline earth metals, transition elements or inner transitional eleme
    8·1 answer
  • Will mark brainliest plz help asap! ​
    15·2 answers
  • Explain the difference in how particles are arranged in a solid,liquids and gases
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!