Question

A 5.00 kilogram block slides along a horizontal,frictionless surface at 10.0 meters per second. for 4.00 seconds. The magnitude of the blocks momentum is ?
A)200 Kg m/s
B)50.0 Kg m/s
C)20.0 Kg m/s
D)12.5 Kg m/s

Answer 1

It's B. They are trying to trick you by adding the time so you would divide the speed by time, which then you multiply to 5 and get D's answer. Ignore the time. The time does not matter. just multiply 5 and 10 to get 50.