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When an object is in free fall
1. its speed stays the same
2. it decelarates
3. it accelerates
4. none of the above
A scalar has
1. magnitude and direction
2. velocity
3. only direction
4. only magnitude
The speed at any given time is called the
1. velocity
2. average speed
3. instantaneous speed
4. all of the above
When no horizontal force acts on a projectile, the horizontal velocity
1. remains constant
2. increases
3. decreases
4. equals zero

This question is a part of a group with common instructions. View group »

The resultant of two perpendicular vectors is the
1. diagonal of a rectangle constructed with the two vectors as sides
2. difference of the two vectors
4. area of a rectangle constructed with the two vectors as sides
If a net force diagram is drawn, such as shown below, wherein the $F_"norm"" at A "=-(F_g)" at C"$, what do you know about the object?
1. The object is accelerating in the direction of the $F_"app"" at B"$ because there is no opposing force to B, and $F_"app"" at "B>0N$.
2. The object is accelerating in the opposite direction of $F_"app"" at B"$ because forces act in equal but opposite pairs.
3. The object is not moving because the $F_"net"=F_"norm"+F_g=0N$.
4. The object is accelerating in the direction of the $F_"app"" at B"$ because the opposing $F_"fric"$ must be negligible, and $F_"app"" at "B>0N$.