Tuesday

November 25, 2014

November 25, 2014

Posted by **Will** on Friday, January 6, 2012 at 9:30pm.

1. What is the combined mass of both cars?

2. What is the combined weight of both cars?

3. What is the total momentum of the system before and after the collision?

4. What is the speed of both cars after the collision?

5. What is the combined kinetic energy of both cars after the collision?

- Physics -
**drwls**, Friday, January 6, 2012 at 11:48pmAren't you able to do any of this yourself? Can you add the masses of the two cars?

Do you know how to compute weight from mass?

Use the definition of momentum for part 3.

Use conservation of momentum for part 4.

Use the definition of kinetic energy and the result of 4. for part 5.

Show your work if further help is needed.

- Physics -
**Will**, Saturday, January 7, 2012 at 8:40amSorry, I can do part 1 and 2 relatively easily. However, I suck at physics and was honestly hoping to receive an answer like the one you gave me. I just wanted to know how to do it, not necessarily get the answer. Thanks

- Physics -
**Will**, Saturday, January 7, 2012 at 3:19pmOk Here are my answers, if you can give me any more help it would be greatly appreciated.

1. 1000+1200=2200

2. Fw = ma

1000*9.8 m/s^2 = 9800

1200*9.8 m/s^2 = 11760

Fw = 21,560

3. Momentum = mv

1000*7 + 1200*6

7000 + 7200

Momentum = 14,200 kg m/s

4. 14,200 / m1+m2

14,200 / 1000+1200

14,200 / 2200

speed after collision = 6.5

**Answer this Question**

**Related Questions**

physics - several students are riding in bumper cars at an amusement park. the ...

pysic - A 328 kg car moving at 19.1 m/s hits from behind another car moving at ...

Physics - A car of mass m moving at a speed v1 collides and couples with the ...

Physics - A car of mass m moving at a speed v1 collides and couples with the ...

Physics - A car of mass m moving at a speed v1 collides and couples with the ...

physics - A car moving at a speed of approximately 176.5 km/h. 923 m in front ...

physics..please help? - At rest, a car’s horn sound at the note A(440Hz) The ...

Physics - A car with a total mass of 1.48 103 kg has wheels of radius 33.5 cm ...

physics - (a) A car with a mass of 950 kg is moving to the right with a constant...

Physics - A car of mass 1100 kg, moving with a speed of 73 mph on a highway, ...