The value of coefficient of restitution in perfectly elastic collision is

How does a host on an Ethernet LAN know when to transmit after a collision has occurred?
1. In a CSMA/CD collision domain, multiple stations can successfully transmit data simultaneously.
2. In a CSMA/CD collision domain, stations must wait until the media is not in use before transmitting.
3. You can improve the CSMA/CD network by adding more hubs.
4. After a collision, the station that detected the collision has first priority to resend the lost data.
5. After a collision, all stations run a random backoff algorithm. When the backoff delay period has expired, all stations have equal priority to transmit data.

A

1 and 3

B

2 and 4

C

1,3 and 4

D

2 and 5

What is the coefficient of restitution for a perfectly elastic collision?

A

0

B

1

C

∞

D

between 0 and 1

What is the result of segmenting a network with a bridge (switch)?
1. It increases the number of collision domains.
2. It decreases the number of collision domains.
3. It increases the number of broadcast domains.
4. It decreases the number of broadcast domains.
5. It makes smaller collision domains.
6. It makes larger collision domains.

A

1 and 5

B

2, 3 and 5

C

3, 4 and 6

D

1, 3 and 6

A sphere of mass 25 Kg is moving at a speed of 1.5 m/s undergoes collision with another sphere of mass 50 Kg moving at 3m/s in the same direction, find the velocity of 50 Kg mass in m/s after collision when the collision is elastic.

A

2.5

B

2.00

C

7.25

D

6.75

A sphere of mass 25 Kg is moving at a speed of 1.5 m/s undergoes collision with another sphere of mass 50 Kg moving at 3m/s in the same direction, find the velocity of 25 Kg mass in m/s after collision when the collision is elastic.

A

2.5

B

2.00

C

3.5

D

6.75

Consider the following sentences.
1. In an inelastic collision, only momentum is conserved.
2. In elastic collision, both momentum and kinetic energy are conserved.
3. In an inelastic collision, both momentum and kinetic energy are conserved
Which of the sentences given above are correct?

A

1 and 2

B

2 and 3

C

1 and 3

D

1 and 3

For perfectly elastic bodies, the value of coefficient of restitution is

A

0

B

0.5

C

1

D

0.25

From the above diagram, the component of velocity along the axis of normal just after the collision by perfectly elastic collision consideration will be

A

u

B

u/2

C

u/3

D

2u

‘u₁’ and ‘u₂’ are the velocities of approach of two moving bodies in the same direction and their corresponding velocities of separation are ‘v₁’ and ‘v₂’. As per Newton's law of collision of elastic bodies, the coefficient of restitution (e) is given by

A

e = v₁ - v₂/u₂ - u₁

B

e = u₂ - u₁/v₁ - v₂

C

e = v₂ - v₁/u₁ - u₂

D

e = v₁ - v₂/u₂ + u₁

‘u₁’ and ‘u₂’ are the velocities of approach of two moving bodies in the same direction and their corresponding velocities of separation are ‘v₁’ and ‘v₂’. As per Newton's law of collision of elastic bodies, the coefficient of restitution (e) is given by

A

$${\text{e}} = \frac{{{{\text{v}}_1} - {{\text{v}}_2}}}{{{{\text{u}}_2} - {{\text{u}}_1}}}$$

B

$${\text{e}} = \frac{{{{\text{u}}_2} - {{\text{u}}_1}}}{{{{\text{v}}_1} - {{\text{v}}_2}}}$$

C

$${\text{e}} = \frac{{{{\text{v}}_2} - {{\text{v}}_1}}}{{{{\text{u}}_1} - {{\text{u}}_2}}}$$

D

$${\text{e}} = \frac{{{{\text{v}}_1} - {{\text{v}}_2}}}{{{{\text{u}}_2} + {{\text{u}}_1}}}$$

The value of coefficient of restitution in perfectly elastic collision is

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