A car heading north suddenly collides at an intersection with a truck of the same mass heading east. If they lock together and travel at 28 m/s at 15° north of east just after the collision, how fast was the car initially traveling?
A) 14 m/s B) 7 m/s C) 11 m/s D) 28 m/s
A
You might also like to view...
A 0.40-kg mass, attached to the end of a 0.75-m string, is whirled around in a circular horizontal path. If the maximum tension that the string can withstand is 400 N, then what maximum speed can the mass have if the string is not to break?
a. 370 m/s c. 19 m/s b. 27 m/s d. 29 m/s
Describe the process of precession
What will be an ideal response?
Halley's comet is named after the English scientist Edmund Halley (1656-1742 ) because
A) he was first person to see it when it passed near Earth in 1682. B) the discoverers named it for him in honor of his financial support. C) he was the most famous astronomer alive in England during its appearance in 1758. D) he calculated its orbit and predicted the year in which it would next be seen.
A plane flying horizontally at a speed of 50 m/s and at an elevation of 160 m drops a package, and 2.0 s later it drops a second package. How far apart will the two packages land on the ground if effects of air resistance are negligible?
A) 100 m B) 160 m C) 180 m D) 320 m