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# Eleventh Grade (Grade 11) Mechanics Questions

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Grade 11 Forces and Motion
When an object is in free fall,
1. its speed stays the same.
2. it decelerates.
3. it accelerates.
4. none of the above.
Grade 11 Forces and Motion

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

$v= (Deltad)/t$ is the equation to calculate
1. acceleration.
2. speed.
3. velocity.
4. slope.
Grade 11 Energy and Momentum
Grade 11 Motion in Two- and Three-Dimensions
Grade 11 Forces and Motion
If a net force diagram is drawn, such as shown, 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
Grade 11 Forces and Motion
Grade 11 Energy and Momentum
Power is defined as
1. the something that enables an object to do work.
2. how much force an object has.
3. the rate at which work is done.
4. energy due to the position of something.
Grade 11 Forces and Motion
Torque is a measure of a force's tendency to produce                  .
1. linear motion
2. freefall motion
3. rotational motion
4. momentum
Grade 11 Forces and Motion
Two rocks are thrown at the same time with the same speed. One is thrown directly downward while the other is thrown straight up. Which statement correctly compares their speeds when they hit the ground?
1. The rock thrown straight up hits the ground at a faster speed.
2. The rock thrown directly downward hits the ground at a faster speed.
3. Both rocks hit the ground at the same speed.
4. There is not enough information to compare their speeds.
Grade 11 Forces and Motion
Grade 11 Forces and Motion
Under what conditions does a pendulum exhibit a simple harmonic motion?
1. Amplitude is small.
2. Friction is negligible.
3. Air drag is negligible.
4. All of the above.
Grade 11 Energy and Momentum
A person walks up a staircase, and a second person runs up the staircase. Who does more work?
1. the person who walks up
2. the person who runs up
3. same work is done in both situations
4. impossible to determine without knowing their masses
Grade 11 Forces and Motion
Given a force diagram like the one shown, if the object is not moving, what do you know about the forces at A and B?
1. $F_"norm"$ is less than $F_g$ because the object stays down on the surface.
2. $F_g$ is always greater than $F_"norm"$ when an object is not moving.
3. $F_"norm"=F_g$ when an object is not moving.
4. $F_"norm"=-(F_g)$ making the $F_"net"=0$ when an object is not moving.
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