All High School Physics Resources
Example Questions
Example Question #11 : Using Circular Motion Equations
The torque applied to a wrench is . If the length of the wrench is , how much force is applied to it?
The formula for torque is:
We are given the total torque and the length of the wrench. Given that the pivot point will be at one end of the wrench, and the force will be applied to the other end, this length can be used as our radius.
Example Question #174 : Motion And Mechanics
How much force is required for a hammer to produce of torque?
The formula for torque is:
We are given the length of the hammer (radius of the swing) and the torque produced. Using these values, we can solve for the force required.
Example Question #31 : Circular Motion
A top spins so that its angular velocity is . If the top has a radius of , what is the tangential velocity of a point on the edge of the top?
The relationship between tangential velocity and angular velocity is:
We are given the angular velocity and the radius, allowing us to solve for the linear (or tangential) velocity.
Example Question #35 : Circular Motion
A top spins so that the angular velocity is . If the top has a radius of , what is the centripetal acceleration acting on a point on the edge of the top?
There is insufficient information to solve
The formula for centripetal acceleration is:
We know the radius, but we need to find the tangential velocity. The relationship between tangential velocity and angular velocity is:
We are given the angular velocity and the radius, allowing us to solve for the linear (or tangential) velocity.
Now we have the linear velocity and the radius, allowing us to use the first equation to find the centripetal acceleration.Example Question #241 : High School Physics
A top spins so that the angular velocity is . If the top has a radius of , what is the centripetal force acting on a point on the edge of the top?
There is insufficient information to solve
There is insufficient information to solve
The formula for centripetal force is:
While we can find what the acceleration will be, there is no way for us to find the mass. The force cannot be calculated.
Example Question #176 : Motion And Mechanics
A girl sits on the edge of a merry-go-round. If she travels at and the radius of her motion is , what is the centripetal acceleration acting upon her?
The formula for centripetal acceleration is:
We are given values for the linear velocity and radius, allowing us to solve for the centripetal acceleration.
Example Question #177 : Motion And Mechanics
A girl sits on the edge of a merry-go-round. If she travels at and the radius of her motion is , what is the centripetal force acting upon her?
The formula for centripetal force is:
We are given the girl's mass, her linear velocity, and the radius of her motion. Using these values, we can calculate the centripetal force.
Example Question #177 : Motion And Mechanics
How much torque is generated by applying of force to the end of a lever?
The equation for torque is:
We are given the force and distance (radius), allowing us to solve for the torque by multiplication.
Example Question #181 : Motion And Mechanics
If of torque is generated by applying of force, how long is the lever arm?
There is insufficient information to solve
The formula for torque is:
We are given the force applied and the torque generated, allowing us to solve for the length of the lever arm.
Example Question #41 : Circular Motion
If of torque is generated using a wrench, how much force is required?
The formula for torque is:
We are given the length of the lever arm and the torque generated, allowing us to solve for the force applied.
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