# Forces and Motion Questions - All Grades

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The Forces and Motion questions below are in the following grade levels:
Grades: 2 3 4 5 6 7 8 9 10 11 12 College
1 2 3 4 ... 37
Grade 11 :: Forces and Motion by tanyamajmudar
According to Hooke’s Law, the graph of the applied force, F, as a function of the displacement of the spring, $x$, will be                                                                                  .
1. a straight line, with slope, $k$, passing through $x = 1/2$
2. a straight line with slope, $k$, passing through $x = 1$
3. a parabola passing through the origin
4. a straight line with slope, $k$, passing through the origin
Grade 11 :: Forces and Motion by tanyamajmudar
What is the value for G measured in SI units?
1. $6.67×10^−11N·(m/(kg))^2$
2. $9.8N/(kg)$
Grade 11 :: Forces and Motion by tanyamajmudar
Which of these situations can Hooke’s Law NOT be applied to?
1. shearing of a block of rubber
2. bending of a concrete beam supported at both ends
3. twisting of a stretched steel wire
4. swinging of a pendulum
Grade 8 :: Forces and Motion by outom964
Grade 11 :: Forces and Motion by kieke
Two students are sitting 1.50 m apart. One student has a mass of 70.0 kg and the other has a mass of 52.0 kg. What is the gravitational force between them?
1. $1.62xx10^-7N$
2. $8.09xx10^8N$
3. $1.08xx10^-7N$
4. $1.09xx10^7N$
Grade 11 :: Forces and Motion by kieke
Grade 11 :: Forces and Motion by kieke
Which forces are drawn on a free-body diagram of an object?
1. only those forces that are exerted by the object
2. all forces exerted on the object and by the object
3. only those forces that are exerted on the object
4. only the sum of the forces exerted on and by the object
Grade 11 :: Forces and Motion by kieke
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 by kieke
Grade 11 :: Forces and Motion by kieke
Given a force diagram like the one below, 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.
Grade 11 :: Forces and Motion by kieke
Calculate the net force acting on this object, and determine, if it is moving, in which direction. The normal force is 500N, the force at C is -372N, the resistive force of friction is -32N, and the force at B is 32N.
1. $F_"net"=-95N$; moving to the left
2. $F_"net"=872N$; at rest
3. $F_"net"=+95N$; moving upwards
4. impossible to determine without knowing the object's mass
Grade 11 :: Forces and Motion by kieke
Grade 11 :: Forces and Motion by tanyamajmudar
What is the SI unit of torque?
1. $Kg*m^2$
2. $N/s$
3. $m^2 / s^2$
4. $Nm$
Grade 11 :: Forces and Motion by tanyamajmudar
Grade 11 :: Forces and Motion by tanyamajmudar
Grade 11 :: Forces and Motion by tanyamajmudar
At what value of the angle between lever arm and applied force, $theta$, is torque at its maximum?
1. $0deg$
2. $30deg$
3. $60deg$
4. $90deg$
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