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
Nonamiya [84]
3 years ago
12

A 5.20g bullet moving at 672 m/s strikes a 700g wooden block atrest on a frictionless surface. The bullet emerges, travelingin t

he same direction with its speed reduced to 428 m/s.
a. What is the resulting speed of the block?
b. What is the speed of the bullet-block center of mass?
Physics
1 answer:
Andreyy893 years ago
7 0

Answer:

a) v=1.81 m/s; B) v=4.95 m/s

Explanation:

using momentum conservation

m1v1+m2v1=m1v2+m2v2

A)

5.2*672+700*0=5.2*428+700v2

The initial velocity of the block is 0, solving for v2

v2=1.81 m/s

B) Now both the bullet and the block travel together

m1v1+m2v1=(m1+m2)v2

5.2*672+700*0=(5.2+700)v

v=4.95 m/s

You might be interested in
If your wave comes into contact with a different medium and is returned to the original medium it is known as:
Strike441 [17]
The return of a wave back to its original medium is called an reflection 
8 0
3 years ago
The circumference of a circle is 12π meters. find the​ circle diameter.
Veseljchak [2.6K]
The circumference of a circle is 2*pi*r=C so plugging in numbers we have
12pi= 2*pi*r so solving for r gives 12pi/2pi=r which gives 6=r so the radius of the circle is 6 meters since diameter is just 2*r this gives 2*r =12 meters so
Diameter = 12meters
7 0
3 years ago
2. A boy pushes forward a cart of groceries with a total mass of 45.0 kg. What is the
likoan [24]

Answer:

A aceleração do carrinho é de, aproximadamente, 1,46 m/s².

Explanation:

F=ma

F: force

m: mass

a: aceleration

66 = 45a

a=66/45= 22/15 ≅ 1,4666 m/s²

4 0
2 years ago
Read 2 more answers
A ball is dropped and bounces off the floor. Its speed is the same immediately before and immediately after the collision. Which
Korolek [52]

Answer:

option B.

Explanation:

The correct answer is option B.

when the ball drops, the velocity of the ball before the collision is v

After the collision, the velocity of the ball is the same but in the opposite direction.

Impulse delivered to the ball and the floor, in this case, is not zero.

The magnitude of the momentum remains the same but the direction of the ball changes.

7 0
3 years ago
3 a A motorcyclist starts from rest and reaches
andrew-mc [135]

The acceleration of the body is 2 m/s^2 while the deceleration is - 1.2 m/s^2.

<h3>What is the acceleration?</h3>

Let us recall that the acceleration is the change in the speed of a body with time. We have been told that the body accelerates for 3s and then decelerates to 2s. This implies that the total time that the object spent in motion is 5 s.

Thus;

v = u + at

v = final velocity

u = initial velocity

a = acceleration

t = time taken

v - u/t = a

a = 6 - 0/3

= 2 m/s^2

Again;

v - u/t = a

a = 0 - 6/5

a = - 1.2m/s^2

Learn more about acceleration:brainly.com/question/12550364

#SPJ1

<h3 />
7 0
1 year ago
Other questions:
  • Suppose the sun were to suddenly disappear. what would happen to the orbital path of earth? it would stay the same, but the eart
    13·2 answers
  • A charge Q is uniformly distributed along the x axis from x = a to x = b. If Q = 45
    13·1 answer
  • Which of these is not a component of physical fitness
    5·2 answers
  • Baseballs pitched by a machine have a horizontal velocity of 30 meters/second. The machine accelerates the baseball from 0 meter
    9·1 answer
  • Which part of a cell releases energy that the cell uses? Cell wall Mitochondria Nucleus Vacuole
    15·2 answers
  • Which type of path do planets follow around the sun?
    5·2 answers
  • Why do the stars appear like pointed objects​
    6·1 answer
  • 6. A yo-yo with a mass of 0.5 kg is tied to a radius of 2 m and is spinning at 3 m/s. What
    5·1 answer
  • How net current on a toroid is zero?​
    7·1 answer
  • The magnitudes of the two displacement vectors are _____ and ______
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!