physics

A BLOCK OF MASS 20KG MOVING WITH A SPEED OF 18 KM/H EXPLODES AND SPLITS INTO 2 PARTS.ONE PART OF MASS 15 KG COMES TO REST FIND THE VELOCITY OF SECOND PART?

  1. 👍 0
  2. 👎 0
  3. 👁 54
  1. 20 * 18 = 15 * 0 + 5 * v

    1. 👍 0
    2. 👎 0
    posted by Damon
  2. because
    momentum before = momentum after

    1. 👍 0
    2. 👎 0
    posted by Damon
  3. since there are no external forces on the system to change its momentum

    1. 👍 0
    2. 👎 0
    posted by Damon
  4. 20*18=15*0+(20-15)*x
    360=0+5*x
    x=360/5
    velocity of the other part=72

    1. 👍 0
    2. 👎 0
    posted by kabilan

Respond to this Question

First Name

Your Response

Similar Questions

  1. Physics

    Block B has a mass of 2.20kg and is moving to the left at a speed of 2.30m/s. Block A has a mass of 2.70kg and is moving to the right. The two blocks undergo a perfectly inelastic collision. What should be the velocity of Block A

    asked by Emily on March 23, 2016
  2. physics

    a particle of mass 5m moving with speed v, explodes and splits into two pieces with masses of 2m and 3m. The lighter piece continues to move in the original direction with speed v relative to the heavier piece. What is the speed

    asked by cynthia-joice on May 27, 2012
  3. physics

    a 20kg block is connested to a 30kg block by a string that passes over a frictionless pully. the 30kg block is connected to a spring that has niglible mass and a force constant of 250n/m.the 20kg block is pulled 20cm down the

    asked by sello on April 7, 2010
  4. physics

    Block A (mass = 3 kg), moving at +5 meters per second, collides with stationary block B (mass = 4 kg). Block A comes to a sudden stop, while block B starts moving. What will be the approximate final speed of block B?

    asked by Rachel on June 5, 2017
  5. physics

    A block of mass 20kg is at rest on a rough horizontal ground,the coefficient of friction between the block and the ground is 0.3.A horizontal force is applied steadily to the block according to the law,F= t^2-t+4.calculate the

    asked by praise on February 21, 2018
  6. Physics

    A 3.0kg object originally at rest explodes and splits into three fragments. One fragment has a mass of .50kg and flies off along the negative x-axis at a speed of 2.8m/s, and another has a mass of 1.3kg and flies off along the

    asked by Kellie on December 18, 2012
  7. Physics MCAT, Help please

    A box of mass m = 6kg slides with speed v = 4 m/s across a frictionless floor. It suddenly explodes into two pieces. One piece, with mass m1 = 2kg moves in the same direction with speed v1 = 8m/s. Find the velocity of the second

    asked by Shahab Mirza on September 24, 2014
  8. physics

    A block of mass m = 3.6 kg, moving on a frictionless surface with a speed vi=9.3m/s makes a perfectly elastic collision with a block of mass M at rest. After the collision, the 3.6 kg block recoils with a speed of vf=2.7m/s. In

    asked by terry on November 16, 2012
  9. PHYSICS

    A 15 kg block is on a ramp which is inclined at 20 degrees above the horizontal. It's connected by a string to a 20kg mass which hangs over the top edge of the ramp. With no frictional forces taken into account, what is the

    asked by SAM on November 7, 2017
  10. physics please help!!

    A moving 2.20kg block collides with a horizontal spring whose spring constant is 419 N/m. The block compresses the spring a maximum distance of 9.00cm from its rest postion. The coefficient of kinetic friction between the block

    asked by archi on October 6, 2011

More Similar Questions