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
ollegr [7]
3 years ago
10

A steel ball of mass 0.500 kg is fastened to a cord that is 70.0 cm long and fixed at the far end. The ball is then released whe

n the cord is horizontal. At the bottom of its path, the ball strikes a 3.00 kg steel block initially at rest on a frictionless surface. The collision is elastic.
Find
(a) the speed of the ball and
(b) the speed of the block just after the collision.
Physics
1 answer:
Liula [17]3 years ago
7 0

Answer:

a) v₁fin = 3.7059 m/s   (→)

b) v₂fin = 1.0588 m/s     (→)

Explanation:

a) Given

m₁ = 0.5 Kg

L = 70 cm = 0.7 m

v₁in = 0 m/s   ⇒  Kin = 0 J

v₁fin = ?

h<em>in </em>= L = 0.7 m

h<em>fin </em>= 0 m   ⇒    U<em>fin</em> = 0 J

The speed of the ball before the collision can be obtained as follows

Einitial = Efinal

⇒ Kin + Uin = Kfin + Ufin

⇒ 0 + m*g*h<em>in</em> = 0.5*m*v₁fin² + 0

⇒ v₁fin = √(2*g*h<em>in</em>) = √(2*(9.81 m/s²)*(0.70 m))

⇒ v₁fin = 3.7059 m/s   (→)

b)  Given

m₁ = 0.5 Kg

m₂ = 3.0 Kg

v₁ = 3.7059 m/s    (→)

v₂ = 0 m/s

v₂fin = ?

The speed of the block just after the collision can be obtained using the equation

v₂fin = 2*m₁*v₁ / (m₁ + m₂)

⇒  v₂fin = (2*0.5 Kg*3.7059 m/s) / (0.5 Kg + 3.0 Kg)

⇒  v₂fin = 1.0588 m/s     (→)

You might be interested in
Wat does gas mean in science
irinina [24]
Basically its just an air like fluid with chemicals.... just like air it just goes as it pleases and fills space
6 0
3 years ago
Read 2 more answers
Which circuit would have the most electrical power?
aliya0001 [1]

the answer is c because it has the most volts

a

6 0
2 years ago
Suppose the coefficient of static friction between a quarter and the back wall of a rocket car is 0.330. At what minimum rate wo
Helga [31]

Answer:3.23 m/s^2

Explanation:

Given

\mu_s =0.330

Frictional Force is balanced by force due to car acceleration

Frictional force F_s

F_s=ma_{min}

\mu_sN=ma_{min}

\mu_s\cdot mg=ma_{min}

a_{min}=\mu_s \cdot g=0.330\times 9.8=3.23 m/s^2

6 0
3 years ago
The creation of electricity in a coil of a wire through the movement of a magnet is called what?
emmasim [6.3K]

Answer:

D. Electromagnetic Induction.

Explanation:

6 0
2 years ago
Need some help
Keith_Richards [23]

The answer is C) the density of the rock

Density of rock is the dependent variable, because it depends on the temperature. The temperature can’t be the dependent variable because ,the density of a rock does not have magical powers that can change temperature of a room. However changing the temperature of the room ,will change the density of the rock. Hope this helps !

4 0
2 years ago
Other questions:
  • You pick up 20-newton book off the floor and put it on a shelf 2 meters high. How much work did you do
    6·1 answer
  • MATHPHYS PLEASE HELP
    7·2 answers
  • How many electrons are in the outer energy level of group 17(7A) atoms?
    15·1 answer
  • Polarized sunglasses work by A. blocking light waves that vibrate in one plane. B. gradually refracting light as it passes throu
    10·2 answers
  • How much potential energy does a 20-kg barrel have when it is in the truck whose floor is 5.0 m above the ground? P.E. = J
    7·1 answer
  • What is one advantage the Hyperloop would have over other types of transportation?
    14·2 answers
  • What type of material does not transfer heat well
    12·2 answers
  • Tần số ngưỡng của một kim loại có giá trị X. Nếu tần số của chùm sáng chiếu đến bề mặt katot tăng từ 2X đến 4X thì cường độ dòng
    13·1 answer
  • HELPP!!!! URGENT!!!!
    11·1 answer
  • Which is the work required to move a charge?
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!