1-In a 2D perfectly elastic collision the total linear momentum after th collisi

Question

1-In a 2D perfectly elastic collision the total linear momentum after th collision is____ the total linear momentum before the collision.

a-equal to b- smaller than c- bigger than

2-As shown in the figure below, a billiard ball traveling at 4m/s in the positive x-direction hits another (identical) billiard ball which is at rest before collision. After the collision the first ball is moving at an angle of 45o above the x-axis while the other one is moving at an angle of 45o below the x -axis. Assume that the mass of each ball is 250 g and  the collision is perfectly elastic. What is the total kinetic energy of the system before the collision?

a-8J b-4J c-16J d-2J

3- In the situation described in problem 2, what is the total linear momentum in the x-direction before the collision?

a-zero b- 1kg m/s c- 2kg m/s d- 0.7kg m/s

4- In the situation described in problem 2, what is the total linear momentum in the y-direction before the collision?

a- 2kg m/s b-1kg m/s c- 0.7kg m/s d-zero

5-In the situation described in problem 2, what is the total linear momentum in the x-direction of the ball after the collision?

a-zero

b- 1kg m/s

c- 2kg m/s

d- 0.7kg m/s

f-There is not enough information to determine the total linear momentum in the x-direction after the collision.

6-In the situation described in problem 2, what is the total linear momentum in the y-direction of the ball after the collision?

a-zero

b- 1kg m/s

c- 2kg m/s

d- 0.7kg m/s

f-There is not enough information to determine the total linear momentum in the x-direction after the collision.

7-Kinetic energy is only conserved in ____ collisions.

perfectly elastic

head-on

elastic

inelastic

8-Linear momentum is conserved _____

a-only in elastic collisions.

only in inelastic collisions.

only in one dimensional collisions.

any type of collisions.

9-In a 2D completely elastic collision____.

a- only the x-component of the linear mometum is conserved

b- only the y-component of the linear mometum is conserved

c- only the kinetic enrgy is conserved

d- the total kinetic energy as well as both the components of the momentum stay conserved

f-There is not enough information to determine the total linear momentum in the x-direction after the collision.

1-In a 2D perfectly elastic collision the total linear momentum after th collision is____ the total linear momentum before the collision. a-equal to b- smaller than c- bigger than 2-As shown in the figure below, a billiard ball traveling at 4m/s in the positive x-direction hits another (identical) billiard ball which is at rest before collision. After the collision the first ball is moving at an angle of 45 degree above the x-axis while the other one is moving at an angle of 45 degree below the x -axis. Assume that the mass of each ball is 250 g and the collision is perfectly elastic. What is the total kinetic energy of the system before the collision? a-8J b-4J c-16J d-2J 3- In the situation described in problem 2, what is the total linear momentum in the x-direction before the collision? a-zero b- 1kg m/s c- 2kg m/s d- 0.7kg m/s 4- In the situation described in problem 2, what is the total linear momentum in the y-direction before the collision? a- 2kg m/s b-1kg m/s c- 0.7kg m/s d-zero 5-In the situation described in problem 2, what is the total linear momentum in the x-direction of the ball after the collision? a-zero b- 1kg m/s c- 2kg m/s d- 0.7kg m/s f-There is not enough information to determine the total linear momentum in the x-direction after the collision. 6-In the situation described in problem 2, what is the total linear momentum in the y-direction of the ball after the collision? a-zero b- 1kg m/s c- 2kg m/s d- 0.7kg m/s f-There is not enough information to determine the total linear momentum in the x-direction after the collision. 7-Kinetic energy is only conserved in ____ collisions. a- perfectly elastic b- head-on c- elastic d- inelastic 8-Linear momentum is conserved _____ a-only in elastic collisions. b- only in inelastic collisions. c- only in one dimensional collisions. d- any type of collisions. 9-In a 2D completely elastic collision____. a- only the x-component of the linear mometum is conserved b- only the y-component of the linear mometum is conserved c- only the kinetic enrgy is conserved d- the total kinetic energy as well as both the components of the momentum stay conserved

Explanation / Answer

a)In a 2D perfectly elastic collision the total linear momentum after th collision is equal the total linear momentum before the collision.

Please raise different question for another one.

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