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# Eleventh Grade (Grade 11) Mechanics Questions

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Grade 11 Forces and Motion
Grade 11 Forces and Motion
Grade 11 Forces and Motion
When an object is in free fall
1. its speed stays the same
2. it decelarates
3. it accelerates
4. none of the above
Grade 11 Fluid Mechanics
Grade 11 Forces and Motion
Grade 11 Forces and Motion
A scalar has
1. magnitude and direction
2. velocity
3. only direction
4. only magnitude
Grade 11 Forces and Motion
The speed at any given time is called the
1. velocity
2. average speed
3. instantaneous speed
4. all of the above
Grade 11 Forces and Motion
When no horizontal force acts on a projectile, the horizontal velocity
1. remains constant
2. increases
3. decreases
4. equals zero
Grade 11 Forces and Motion
Grade 11 Forces and Motion
Grade 11 Forces and Motion

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

Grade 11 Forces and Motion
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
3. two vectors added together
4. area of a rectangle constructed with the two vectors as sides
Grade 11 Forces and Motion
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 $F_"app"" at "B>0N$.
Grade 11 Forces and Motion
Velocity is
1. the slope of a linear graph
2. acceleration divided by displacement
3. speed with direction
4. the same in all reference frames
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