Physics
Grade-8
Easy

Question

There are two cars, car A and car B. Mass of car A is 10000 kg, travelling at 30 fraction numerator m over denominator s end fraction collide with car B of mass 30000 kg travelling at 20 fraction numerator m over denominator s end fraction in same direction. After collision, the velocity of car A becomes 40 fraction numerator m over denominator s end fraction. Calculate the velocity of car B after the collision?

  1. fraction numerator 50 over denominator 3 end fraction fraction numerator m over denominator s end fraction    
  2. fraction numerator 50 over denominator 3 end fraction fraction numerator m over denominator s end fraction    
  3. fraction numerator 53 over denominator 3 end fraction fraction numerator m over denominator s end fraction    
  4. fraction numerator 47 over denominator 3 end fraction fraction numerator m over denominator s end fraction    

hintHint:

The formula for the law of conservation of momentum is: m 1 u 1 + m 2 u 2 = m 1 v 1 + m 2 v 2.

The correct answer is: fraction numerator 50 over denominator 3 end fraction fraction numerator m over denominator s end fraction


    The formula for the law of conservation of momentum is: m 1 u 1 + m 2 u 2 = m 1 v 1 + m 2 v 2.
    10000 cross times 30 plus 30000 cross times 20 equals 10000 cross times 40 plus 30000 cross times v 2
v 2 equals 50 over 3 m divided by s

    Related Questions to study

    Grade-8
    Physics

    There are two cars, car A and car B. Mass of car A is 2000 kg, travelling at 30 fraction numerator m over denominator s end fraction collide with car B of mass 3000 kg travelling at 40 fraction numerator m over denominator s end fraction in same direction. After collision, the velocity of car A becomes 50 fraction numerator m over denominator s end fraction. Calculate the velocity of car B after the collision?

    There are two cars, car A and car B. Mass of car A is 2000 kg, travelling at 30 fraction numerator m over denominator s end fraction collide with car B of mass 3000 kg travelling at 40 fraction numerator m over denominator s end fraction in same direction. After collision, the velocity of car A becomes 50 fraction numerator m over denominator s end fraction. Calculate the velocity of car B after the collision?

    PhysicsGrade-8
    Grade-8
    Physics

    A 3,000 kg truck moving at +10 fraction numerator m over denominator s end fraction hits a 1,000 kg parked car which moves off at +15 fraction numerator m over denominator s end fraction. What is the velocity of the truck?

    A 3,000 kg truck moving at +10 fraction numerator m over denominator s end fraction hits a 1,000 kg parked car which moves off at +15 fraction numerator m over denominator s end fraction. What is the velocity of the truck?

    PhysicsGrade-8
    Grade-8
    Physics

    The following example follows law of conservation of momentum. Is the statement true or false?

    The following example follows law of conservation of momentum. Is the statement true or false?

    PhysicsGrade-8
    parallel
    Grade-8
    Physics

    The following example follows law of conservation of momentum. Is the statement true or false?

    The following example follows law of conservation of momentum. Is the statement true or false?

    PhysicsGrade-8
    Grade-8
    Physics

    The following example follows law of conservation of momentum. Is the statement true or false?

    The following example follows law of conservation of momentum. Is the statement true or false?

    PhysicsGrade-8
    Grade-8
    Physics

    The following example follows law of conservation of momentum. Is the statement true or false?

    The following example follows law of conservation of momentum. Is the statement true or false?

    PhysicsGrade-8
    parallel
    Grade-8
    Physics

    The total momentum before a collision is ____ the total momentum after a collision

    The total momentum before a collision is ____ the total momentum after a collision

    PhysicsGrade-8
    Grade-8
    Physics

    Law of conservation of momentum states that

    Law of conservation of momentum states that

    PhysicsGrade-8
    Grade-8
    Physics

    What can you say about the numerical data from the figure, in connection with the conservation of linear momentum?

    What can you say about the numerical data from the figure, in connection with the conservation of linear momentum?

    PhysicsGrade-8
    parallel
    Grade-8
    Physics


    What is the momentum of car after collision?


    What is the momentum of car after collision?

    PhysicsGrade-8
    Grade-8
    Physics


    What is the momentum of truck before collision?


    What is the momentum of truck before collision?

    PhysicsGrade-8
    Grade-8
    Physics


    What is the momentum of car before collision?


    What is the momentum of car before collision?

    PhysicsGrade-8
    parallel
    Grade-8
    Physics

    The following example follows law of conservation of momentum. Is the statement true or false?

    The following example follows law of conservation of momentum. Is the statement true or false?