1. Which of the following are conserved in a totally inelastic collision?

Only momentum
Only kinetic energy
Both momentum and kinetic energy
Neither momentum nor kinetic energy <---
It depends on the objects.

2. Two skaters stand face to face. Skater 1 has a mass of 55 kg, and skater 2 has a mass of 75 kg. They push off one another and move in opposite directions. What is the ratio of skater 1's speed to skater 2's speed?

1:1
55:75
55:130
75:55
Not enough information to tell <----

3.A massless string connects three blocks,2kg, 4kg, and 6kg, respectively. A force of 24 N acts on the system. What is the acceleration of the blocks and the tension in the rope attached to the 2 kg block?

4 m/s² 12 N
2 m/s² 4 N
2 m/s² 24 N <---
12 m/s² 2 N
4 m/s² 6 N

1. 👍 0
2. 👎 0
3. 👁 140
1. 1. MOMENTUM IS SACRED !!!!!!
If no external force, no change in momentum

2. 55 V1 + 75 V2 = 0
V1/V2 = - 75/55

3. m = 12
a = F/m = 24/12 = 2 m/s^2

I can not answer part 2 because I do not have the diagram. However I think your answer unlikely unless that rope pulls on ALL the blocks

1. 👍 0
2. 👎 0
posted by Damon
2. Yes, the rope pulls all of the blocks to the right.

Thank you so much for your help.

1. 👍 0
2. 👎 0
posted by unknown

## Similar Questions

1. ### AP Physics - collisions?

Two steel balls collide and bounce apart in an isolated system. If the final kinetic energy is less than the initial kinetic energy, what of the following is true? a) Momentum is conserved in this elastic collision incorrect b)

asked by Anonymous on August 30, 2017
2. ### physics

Determine for each of the following statements whether it is always true or can be false. In a perfectly inelastic collision, the kinetic energy is conserved. Kinetic energy is conserved in an elastic collision. Two objects of

asked by Katie on March 2, 2012
3. ### physics

Hello, I'm trying to figure out which of the following statements are TRUE. I suspect that 2, 6, 8 are true...and that there is one more that is true, but not sure which one? Thanks! It is impossible to have a collision between

asked by John on October 29, 2011
4. ### Physics

Hello, I'm trying to figure out which of the following statements are TRUE. I suspect that 2, 6, 8 are true...and that there is one more that is true, but not sure which one? Thanks! It is impossible to have a collision between

asked by Anonymous on October 29, 2011
5. ### physics

Which of the following statements is true for an inelastic collision? A. Both momentum and kinetic energy are conserved. B. Momentum is conserved, but kinetic energy is not conserved. C. Kinetic energy is conserved, but momentum

asked by Joe on March 5, 2011
6. ### Physics

Consider an isolated system consisting of two masses, each of which has a velocity vector in two dimensions. When these two masses collide the total momentum of the system is conserved. (a) Show that if the total momentum of the

asked by Tim on March 30, 2014

I have a big online test and would really appreciate if you could please check my answers before I submit them (I only have 1 try) Two equivalent masses are attached by a rope that hangs over a pulley. Since the coefficient of

asked by Tyger2020 on September 6, 2017

block 1 of mass 1 slides from rest along a frictionless ramp from height h=2.50m and then collides with stationary block 2, which has mass2=2.00 m1. After the collision, block 2 slides into a region where the coefficient of

asked by Krystal on November 10, 2006
9. ### physics # 3

3. In a perfectly inelastic collision which of the following is conserved, (give the most accurate answer). a.) Linear momentum b.) Kinetic energy c.) Linear momentum d.) Total mechanical energy, (KE +PE) e.) Heat energy

asked by gomez on August 7, 2007
10. ### Physics

Two lumps of clay having equal masses and speeds, but traveling in opposite directions, collide and stick together. Which of the following statements about this system of lumps must be true? A. The momentum of the system is

asked by Joe on March 5, 2011

More Similar Questions