Question

____ is rate of change of position.
Speed
Velocity
Acceleration
Displacement
2. Which of the following is the difference between speed and velocity?
direction
units
speed
none of the above
3. A planet is discovered that is the same size as Earth and has the same gravitational acceleration, but it has twice the mass. If you weigh 700 N on Earth, on the new planet you would weigh ____.
350 N
700 N
1,400 N
2,800 N

Answer 1

My answers are
b
d
c

Answer 2

#1 and 3 are ok, but the difference between speed and velocity is direction.

The magnitude of the velocity is the speed, but the velocity is a vector quantity, which is a directed speed.