A car has 400 kgm/s worth of momentum and runs into a truck initially at rest. After the collision, the truck has 500 kgm/s worth of momentum. What must be the final momentum of the car and truck combined? A. 400 kgm/s
B. -100 kgm/s
C. 500 kgm/s
D. 100 kgm/s

another example of kinetic energy would be,

kinetic energy   >     moving energy

answer   >   letter choice (c),   a hammer falling off a table.

hope that !                                         : )

laticia draws the diagram below to show earth’s magnetic field.

answer

the arrows to the right of earth should point up.

force required to detach it is given by

charges are taken to be fundamental charge

now we have

so above is the minimum distance at which it will detach