A 150kg cart moving at 13m/s east collided with a 420kg wagon

  • Thread starter Thread starter lcp1992
  • Start date Start date
  • Tags Tags
    Cart
AI Thread Summary
The discussion revolves around a physics problem involving a collision between a 150kg cart and a 420kg wagon. The cart, initially moving east at 13m/s, rebounds westward at 3m/s after the collision. The conservation of momentum equation is applied to find the speed of the wagon post-collision. The initial calculation yielded 8.57m/s, but the correct answer is identified as 11m/s. The importance of correctly applying signs in momentum equations is emphasized in the solution process.
lcp1992
Messages
12
Reaction score
0

Homework Statement


A 150kg cart moving at 13m/s east collided with a 420kg wagon moving at 5m/s east.The cart rebounded westward with a speed of 3m/s. What was the speed of the wagon after the collision?


Homework Equations



m1v1+m2v2=m'1v'1+m'2v'2


The Attempt at a Solution


I solved the problem with this formula but i got 8.57m/s as the answer but the correct answer should be 11m/s.
 
Physics news on Phys.org


Watch your signs(+/-)
 


thanks!
 

Thread 'Rolling without slipping on a curved surface'

Kindly see the attached pdf. My attempt to solve it, is in it. I'm wondering if my solution is right. My idea is this: At any point of time, the ball may be assumed to be at an incline which is at an angle of θ(kindly see both the pics in the pdf file). The value of θ will continuously change and so will the value of friction. I'm not able to figure out, why my solution is wrong, if it is wrong .
View full post »
Thread 'Voltmeter readings for this circuit with switches'

Thread 'Voltmeter readings for this circuit with switches'

TL;DR Summary: I would like to know the voltmeter readings on the two resistors separately in the picture in the following cases , When one of the keys is closed When both of them are opened (Knowing that the battery has negligible internal resistance) My thoughts for the first case , one of them must be 12 volt while the other is 0 The second case we'll I think both voltmeter readings should be 12 volt since they are both parallel to the battery and they involve the key within what the...
View full post »

Similar threads

Momentum: why don't the two carts become one?
Replies
32
Views
1K
What Is the Wagon's Speed After an Elastic Collision?
Replies
2
Views
3K
Impulse and momentum in one dimension - Two carts are moving
Replies
16
Views
3K
Momentum problem: 2 carts, finding initial speed
Replies
13
Views
6K
Cart/putty collision question (conservation of momentum)
Replies
6
Views
6K
Conservation of Momentum Lab (Carts Collide and Stick Together)
Replies
8
Views
3K
Finding Velocity of Cart 1 in Elastic Collision on Inclined Plane
Replies
6
Views
2K
How Does Rain Affect the Momentum and Speed of a Moving Cart?
Replies
20
Views
2K
Collision problem: Two hockey pucks collide and stick together....
Replies
4
Views
2K
Finding velocities in super elastic collision
Replies
3
Views
2K

Hot Threads

Recent Insights

Back
Top