PRACTICE ITUse the worked example above to help you solve this problem. Two billiard balls of identical mass movetoward each other as shown in the figure. Assume that the collision between them is perfectly elastic. Ifthe initial velocities of the balls are v = +28.1 cm/s and v2 = -20.7 cm/s, what are the velocities of theballs after the collision? Assume friction and rotation are unimportant. (Indicate the direction with the signofyour answer.)-20.7cm/s28.1cm/sEXERCISEHINTS: GETTING STARTED I I'M STUCK!Find the final velocity of the two balls if the ball with velocity v2, = -20.7 cm/s has a mass equal to halfthat of the ball with initial velocity v1/ = +28.1 cm/s. (Indicate the direction with the sign of your answer.)Let the mass of the ball traveling at -20.7 cm/s be equal to m/2. The mass of the ball traveling atvs 28.1 cm/s would then be equal to m. Write conservation of momentum in terms of m, m/2, and theinitial and final velocities of the balls. Apply conservation of energy in the form of v1; - v2 = -(V1- v2). You have two equations and two unknowns, so you should be able to solve for the unknowns.cm/sLet the mass of the ball traveling at -20.7 cm/s be equal to m/2. The mass of the ball traveling atV2, 28.1 cm/s would then be equal to m. Write conservation of momentum in terms of m, m/2, and theinitial and final velocities of the balls. Apply conservation of energy in the form of v1, - V21 = -(V1- v2). You have two equations and two unknowns, so you should be able to solve for the unknowns.cm/s

Question
Asked Feb 23, 2020
1 views
PRACTICE IT
Use the worked example above to help you solve this problem. Two billiard balls of identical mass move
toward each other as shown in the figure. Assume that the collision between them is perfectly elastic. If
the initial velocities of the balls are v = +28.1 cm/s and v2 = -20.7 cm/s, what are the velocities of the
balls after the collision? Assume friction and rotation are unimportant. (Indicate the direction with the sign
of
your answer.)
-20.7
cm/s
28.1
cm/s
EXERCISE
HINTS: GETTING STARTED I I'M STUCK!
Find the final velocity of the two balls if the ball with velocity v2, = -20.7 cm/s has a mass equal to half
that of the ball with initial velocity v1/ = +28.1 cm/s. (Indicate the direction with the sign of your answer.)
Let the mass of the ball traveling at -20.7 cm/s be equal to m/2. The mass of the ball traveling at
vs 28.1 cm/s would then be equal to m. Write conservation of momentum in terms of m, m/2, and the
initial and final velocities of the balls. Apply conservation of energy in the form of v1; - v2 = -(V1
- v2). You have two equations and two unknowns, so you should be able to solve for the unknowns.
cm/s
Let the mass of the ball traveling at -20.7 cm/s be equal to m/2. The mass of the ball traveling at
V2, 28.1 cm/s would then be equal to m. Write conservation of momentum in terms of m, m/2, and the
initial and final velocities of the balls. Apply conservation of energy in the form of v1, - V21 = -(V1
- v2). You have two equations and two unknowns, so you should be able to solve for the unknowns.
cm/s
help_outline

Image Transcriptionclose

PRACTICE IT Use the worked example above to help you solve this problem. Two billiard balls of identical mass move toward each other as shown in the figure. Assume that the collision between them is perfectly elastic. If the initial velocities of the balls are v = +28.1 cm/s and v2 = -20.7 cm/s, what are the velocities of the balls after the collision? Assume friction and rotation are unimportant. (Indicate the direction with the sign of your answer.) -20.7 cm/s 28.1 cm/s EXERCISE HINTS: GETTING STARTED I I'M STUCK! Find the final velocity of the two balls if the ball with velocity v2, = -20.7 cm/s has a mass equal to half that of the ball with initial velocity v1/ = +28.1 cm/s. (Indicate the direction with the sign of your answer.) Let the mass of the ball traveling at -20.7 cm/s be equal to m/2. The mass of the ball traveling at vs 28.1 cm/s would then be equal to m. Write conservation of momentum in terms of m, m/2, and the initial and final velocities of the balls. Apply conservation of energy in the form of v1; - v2 = -(V1 - v2). You have two equations and two unknowns, so you should be able to solve for the unknowns. cm/s Let the mass of the ball traveling at -20.7 cm/s be equal to m/2. The mass of the ball traveling at V2, 28.1 cm/s would then be equal to m. Write conservation of momentum in terms of m, m/2, and the initial and final velocities of the balls. Apply conservation of energy in the form of v1, - V21 = -(V1 - v2). You have two equations and two unknowns, so you should be able to solve for the unknowns. cm/s

fullscreen
check_circle

Expert Answer

Step 1

Physics homework question answer, step 1, image 1

Step 2

Physics homework question answer, step 2, image 1

Step 3

Physics homework question answer, step 3, image 1

...

Want to see the full answer?

See Solution

Check out a sample Q&A here.

Want to see this answer and more?

Solutions are written by subject experts who are available 24/7. Questions are typically answered within 1 hour.*

See Solution
*Response times may vary by subject and question.

Related Physics Q&A

Find answers to questions asked by student like you
Show more Q&A
add
question_answer

Q: Using a simple pulley and rope system, a т, crewman on an Arctic expedition is trying to frictionles...

A: Draw the free-body diagram of the block and crewman as shown below.

question_answer

Q: Two gliders are on a frictionless, level air track. Both gliders are free to move. Initially, glider...

A: The initial momentum of the glider system before the collision. The final momentum of the glider sy...

question_answer

Q: Use the worked example above to help you solve this problem. Two billiard balls of identical mass mo...

A: Click to see the answer

question_answer

Q: The infinite sheets in the figure below are both positively charged. The sheet on the left has a uni...

A: Click to see the answer

question_answer

Q: In a vertical dive, a peregrine falcon can accelerate at 0.6 times the free-fall acceleration g (tha...

A: Click to see the answer

question_answer

Q: At what rate must a cylindrical spaceship rotate if occupants are to experience simulated gravity of...

A: Simulated gravity,

question_answer

Q: (6) The generator coil shown in Figure is rotated through one-fourth of a revolution (from 9 = 0o to...

A: Click to see the answer

question_answer

Q: In the figure below, a solid sphere, of radius a = 1.50 cm is concentric with a spherical conducting...

A: Given information: Radius of the sphere (a) = 1.50 cm = 0.015 m The inner radius of the shell (b) = ...

question_answer

Q: If a car takes a banked curve at less than a given speed, friction is needed to keep it from sliding...

A: Given Radius r = 84 m Angle θ = 14o