# Physics

## Physics: Uniform Motion

Submitted by ramelcoletana on February 28, 2021 - 1:07pm

A Metra commuter train leaves

Union Station in Chicago at 12 noon. Two hours later, an

Amtrak train leaves on the same track, traveling at an

average speed that is 50 miles per hour faster than the

Metra train. At 3 PM the Amtrak train is 10 miles behind the

commuter train. How fast is each going?

## Physics: Uniform Motion

Submitted by ramelcoletana on February 28, 2021 - 12:57pm

A motorboat maintained a

constant speed of 15 miles per hour relative to the water in

going 10 miles upstream and then returning. The total time

for the trip was 1.5 hours. Use this information to find the

speed of the current.

Ans: 5 mi/hr.

Any solution for this? Thanks

## vector analysis

Submitted by Benjie Magallano on November 9, 2017 - 6:18pm

how to solve the tension force of a two ropes connected in a box of 100lb and is being hang. the angles of the ropes are 60? Meaninig the box is in the center.