I'm stuck, for the past 30 minutes. Anyone care to give a struggling student a hand? Any help would be appreciated due to that fact that I don't understand the material. I have notes, yet I have one of those teachers who talk, but don't teach. I don't know. Thanks to anyone who can help me out.(adsbygoogle = window.adsbygoogle || []).push({});

1.) An 8.00g bullet is fired into a 250g block that is initially at rest at the edge of a table of height 1.00m. The bullet remains in the block and after the impact the block lands 2.00m from the bottom of the table. Determine the initial speed of the bullet.

2.) A 1200kg car traveling initially with a speed of 25m/s in an eaterly direction crashes into the rear end of a 9000kg truck moving in the same direction at 20m/s. The veolcity of the car right after the collision is 18m/s to the east. What is the velocity of the truck right after the collision? How much mechanical enegry is lost in the collision? Account for this loss in energy.

3.) Two automobiles of equal mass approach an intesection. One vehicle is traveling with velocity 13m/s toward the east and the other is traveling north with speed V2i. Neither driver sees each the other. The vehicles collide in the intersection and stick together, leaving parallel ski marks at an angle of 55 degrees north of east. The speed limit for both roads is 35mi/hr and the driver of the northward-moving vehicle claims he was within the speed limit when the collision occurred. Is he telling the truth?

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Glancing Collisions

**Physics Forums | Science Articles, Homework Help, Discussion**