Conservation of Momentum: A 328-kg car moving at 19.1 m/s in the +x direction hits from behind a second car moving at 13.0 m/s in the same direction. If the second car has a mass of 790 kg and a speed of 15.1 m/s right after the collision, what is the velocity of the first car after this sudden collision?

A. 14.0 m/s
B. 18.2 m/s
C. 24.2 m/s
D. -14.0 m/s


Answer: A

Physics & Space Science

You might also like to view...

What information is needed to calculate the mass of Jupiter?

A) the orbital period and distance of Jupiter's orbit around the Sun B) the orbital period and distance of one of Jupiter's moons C) the orbital speed of one of Jupiter's moons D) the Sun's mass and how Jupiter's speed changes during its elliptical orbit around the Sun E) the Sun's mass and the average distance of Jupiter from the Sun

Physics & Space Science

What do moonquakes reveal about the Moon?

A) It has a strong magnetic field generated by a large molten core. B) It has a differentiated core, displaced away from us by the Moon's rotation. C) Its small, partially molten core has been pulled toward us by tidal forces. D) The Moon has been geologically dead throughout its entire history. E) The Moon is quite active, almost as much so as Jupiter's moon Io.

Physics & Space Science

If the electromagnetic force is stronger than gravity, then why is it overpowered by gravity on large scales?

A) The electromagnetic force only works on scales of about the size of an atomic nucleus. B) The electromagnetic force follows an inverse cube law with distance, rather than an inverse square law. C) Electrical charge is canceled out by mass. D) Most objects are electrically neutral.

Physics & Space Science

When a guitar is tuned to adjust it pitch, what is it that is changed?

A) The wavelength of the fundamental. B) The amplitude of the fundamental. C) The frequency of the fundamental.

Physics & Space Science