Suppose you read the following description in the want ads for a used car: mint condition, 55,000 miles on the odometer, model XJ4500, willing to accept reasonable offer. Describe the usefulness of each piece of data. What do the more valuable pieces of data have in common?

the first american roller coaster was the mauch chunk switchback railway, built in the mountains of pennsylvania in the mid-1800s. the track, originally built to send coal to a railway, was reconfigured as a "scenic tour."

the chart show the masses and velocities of two colliding objects that stick together after a collision.

according to the law of conservation of momentum, the momentum of the object after the collision is  

answer

1,500

kg • m/s.

the answer is f1 and d2 because if you put equal force on those two points the beam would balance trust me on this