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
Goshia [24]
4 years ago
13

A rifle has a mass of 7-kg and the bullet has a mass of 0.7-kg. If the velocity of the bullet is 350-m/s after the rifle is fire

d, what is the recoil velocity of the rifle?
Physics
1 answer:
nevsk [136]4 years ago
8 0

Answer:

-35 m/s

Explanation:

Momentum is conserved.

Momentum before firing = momentum after firing

m₁u₁ + m₂u₂ = m₁v₁ + m₂v₂

Before the bullet is fired, the bullet and rifle have no velocity, so u₁ and u₂ are 0.

0 = m₁v₁ + m₂v₂

Given m₁ = 0.7 kg, v₁ = 350 m/s, and m₂ = 7 kg:

0 = (0.7 kg) (350 m/s) + (7 kg) v

v = -35 m/s

The rifle recoils at 35 m/s in the opposite direction.

You might be interested in
What important milestone occurred as a result of the Soviets' use of the R-7
AleksAgata [21]

Answer:

d

Explanation:

4 0
2 years ago
Read 2 more answers
Consider a satellite in a circular orbit around the earth. Why is it important to give a satellite a horizontal speed when placi
Andrei [34K]

Answer:

In this case, the horizontal velocity of the rocket starts from the acceleration, so if its velocity drops to zero,

Explanation:

When a satellite is in orbit the most important force is the docking of gravity with the Earth

             F = m a

where the acceleration is centripetal and F is the force of universal attraction

centripetal acceleration is

             a = v² / r

             

             F = m v² / r

In this case, the horizontal velocity of the rocket starts from the acceleration, so if its velocity drops to zero, the force also drops to serious and the satellite steels to Earth.

The speed of the satellite is provides the speed, by local for smaller speeds in satellite, it descends in its orbits and when the speed is amate you have the energy to stop an orb to go to a higher orbit.

4 0
3 years ago
]A nuclear power plant produces huge amount of electricity. However, it dumps radioactive wastes into the sea. This has led to a
katrin2010 [14]
The best and most correct answer among the choices provided by your question is the third choice or letter C.

The best method to solve the problem is: <span>Provide the nuclear power plant with a plan to properly dispose of and recycle the wastes. </span>

I hope my answer has come to your help. Thank you for posting your question here in Brainly. We hope to answer more of your questions and inquiries soon. Have a nice day ahead!
5 0
3 years ago
Read 2 more answers
a stomp rocket takes 1.5 seconds to reach its maximum height what was the initial velocity and what was the maximum height ?
Zinaida [17]
1) Vf = Vo - gt; Vf = 0 => Vo = gt = 9.8m/s^2 * 1.5s = 14.7 m/s

2) d = Vo*t - gt^2 /2 = 14.7m/s*1.5 - 9.8m/s^2 * (1.5s)^2 / 2 = 11.02 m

 
5 0
3 years ago
Read 2 more answers
If forces acting on an object are unbalanced, which factor may result from an unbalanced force? A.The net force is negative. B.T
bezimeni [28]

Answer:

<h2>A. The net force is negative.</h2>

Explanation:

just took the test :)

4 0
3 years ago
Read 2 more answers
Other questions:
  • Brass is an alloy made from copper and zinc a 0.59 kg brass sample at 98.0 is dropped into 2.80 kg of water at 5.0 c if the equi
    14·2 answers
  • Problem 6.056 Air enters a compressor operating at steady state at 15 lbf/in.2, 80°F and exits at 275°F. Stray heat transfer and
    7·1 answer
  • Which statement regarding the importance of human relations is false? A. People accomplish more in their work and personal lives
    6·2 answers
  • What is true of all particles of gas enclosed within a container?
    15·2 answers
  • A resource, such as oil, that cannot regenerate in a reasonable amount of time is called
    7·2 answers
  • a resultant force of 4n acts on an object of mass 0.50kg for 3 seconds. what is the change in velocity caused by this force​
    12·1 answer
  • What is meant by lateral inversion​
    14·1 answer
  • In both ionic and molecular bonds, the resulting compound is stabilized because
    10·1 answer
  • Which statement is true about the circuit diagram below?
    5·1 answer
  • ) The magnitude of scalar product of two unit vectors perpendicular to each other is ​
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!