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Topic : Collisions and Conservation of Momentum

1. Two children are standing still on ice and push off each other. Each has a momentum after the push. Do they violate the conservation of law? Initial momentum is zero.

2. Describe how the conservation law works with elastic and inelastic collisions.

3. In general, for elastic collisions with stationary objects, when will the first object bounce back? When will it follows the stationary object after the collision?

4. What is the use of airbags in vehicles?

5. Why are seatbelt designed to be stretchable?

Sagot :

  1. As Initial momentum is zero then final will be zero.So afterwards total momentum will be 0.
  2. The conservation law works with elastic the collison kinetic energy. And while in the inelastic collisions the energy is not conserved.
  3. The stationary object will cause the greater momentum change.
  4. It usually reduce the chances of upper body crash during an aciident.
  5. The seatbelt designed to be stretchable as itwill cause greter momentum to reduce .

What is momentum?

It is amount of force or motion that cause the movement or moving of body.

Thus it is well explained.

To learn more about the collisions refer to link ;

https://brainly.com/question/7694106

1.No they do not violate the conservation of law. Because the initial momentum can be zero.

2. The momentum is conserved in both elastic and inelastic collision.

What is the law of conservation of momentum?

The momentum of the body before the contact is always equal to the momentum of the body after the impact, according to the rule of conservation of momentum.

According to the law of conservation of momentum;

Momentum before collision =Momentum after collision

[tex]\rm m_1u_1 + m_2u_2 = v(m_1 + m_2)[/tex]

1.No they do not violate the conservation of law. Because the initial momentum can be zero.

2. The momentum is conserved in both elastic and inelastic collision. Hence the conservation law works with elastic and inelastic collisions.

3. An elastic collision is one in which kinetic energy is conserved, meaning that the total kinetic energy before and after the impact is the same.

The object bounces once after the body gets struck. When the body's final velocity is zero it follows the stationary object after the collision.

4.. Airbags are meant to inflate automatically in the case of an abrupt deceleration or impact force indicative of a collision.

When the bag is fully inflated, it protects the driver and/or passenger by Increasing cushioning around the driver's neck, head, and spine.

5. Stretchable seatbelts are meant to allow a passenger's considerable velocity to be slowly reduced, preventing the passenger from being flung forward abruptly.

As a result, if the automobile collides, serious casualties can be avoided.

Hence no they do not violate the conservation of law. Because the initial momentum can be zero.

To learn more about the law of conservation of momentum refer;

https://brainly.com/question/1113396

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