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
boyakko [2]
3 years ago
14

A rifle of mass 2 kg is suspended by strings. The rifle fires a bullet of mass 0.01 kg at a speed of 200 m/s. The recoil velocit

y of the rifle is about ____.
(A) 0.001 m/s.
(B) 0.01 m/s.
(C) 0.1 m/s.
(D) 1 m/s
Physics
1 answer:
ozzi3 years ago
5 0

Answer:

option D  

Explanation:

given,

mass of the rifle,M = 2 Kg

mass of the bullet , m = 0.01 Kg

speed of the bullet, v = 200 m/s

recoil velocity ,v'= ?

initial velocity of bullet and rifle is zero.

using conservation of energy

Mu + m u' = M v'+ m v

0 + 0  = 2 x v' + 0.01 x 200

2 v' = -2

   v' = -1 m/s

negative sign represent the velocity of rifle is in opposite direction of bullet.

hence, the correct answer is option D  

You might be interested in
For her birthday, amy received flowers that had a dull red appearance. compared with the entire range of visible light waves, th
Cerrena [4.2K]
The flowers reflect relatively low frequency and low amplitude light waves.
White light contains a spectrum of colors, and red light is at the beginning of this spectrum in terms of energy. This means that it has the lowest frequency, as the energy of a wave of light is directly proportional to its frequency.
The amplitude of a light wave gives a measure of how intense the light is. A dull light means that the amplitude of the wave is low.
4 0
3 years ago
Describe how freezing could be used to remove sugar from a mixture of sugar and water?
VARVARA [1.3K]
When the mixture (the sugar and water) is frozen, it separates. The water molecules get closer together, separating and pushing the sugar crystals to the top.<span />
7 0
3 years ago
Read 2 more answers
What is kinetic energy?
Lemur [1.5K]

Answer:

A, the energy an object has due to its motion.

Explanation:

Kinetic energy is the energy created by motion.

3 0
3 years ago
Read 2 more answers
People's perceptions of what is important in life are known as:
tangare [24]
Social perception (or person perception) is the study of how people form impressions of and make inferences about other people as sovereign personalities.A real-world example of social perception is understanding that others disagree with what one said when one sees them roll their eyes.
6 0
3 years ago
How much rope would need to be pulled through a pulley with a mechanical advantage of 2 to lift a load 4 ft?
blondinia [14]
8 feet of rope is needed.
8 0
3 years ago
Read 2 more answers
Other questions:
  • At distances greater than 2 femtometers, the nuclear strong force is stronger than (select all that apply):
    13·2 answers
  • How many grams of oxygen (O2), x, are needed to react with the 700 g of iron to produce 1000 g of iron (III) oxide, Fe2O3?
    6·1 answer
  • A body moving with a velocity of 20 m/s begins to accelerate at 3 m/s2. How far does the body move in 5 seconds?
    13·2 answers
  • the diagram shows a ray of light striking a mirror that is above a sink full of water explain what what will happen to the beam
    9·2 answers
  • A 60-kg swimmer suddenly dives horizontally from a 150-kg raft with a speed of 1.5 m/s. The raft is initially at rest. What is t
    11·1 answer
  • An electroscope is a simple device consisting of a metal ball that is attached by a conductor to two thin leaves of metal foil p
    9·1 answer
  • A certain atom has 26 protons, 26 electrons, and 30 neutrons. It mass number is?
    8·2 answers
  • Anybody from India ?​
    7·2 answers
  • A person might be using social media in an unhealthy way if:
    14·2 answers
  • What type of nuclear reaction is shown in the diagram below? Write 2 - 3 sentences describing what happens in this reaction, whe
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!