Rotational Motion

The figure above shows a uniform meterstick that is set on a fulcrum at its center. A force of magnitude F toward the bottom of the page is exerted on the meterstick at the position shown. At which of the labeled positions must an upward force of magnitude 2F be exerted on the meterstick to keep the meterstick in equilibrium?

• A

• B

• C

• D

Tags

NGSS.HS-PS2-1

The broomstick shown is in static equilibrium. The torque due to the mass to the right of the person's finger is ____________ compared to the torque due to the mass to the left of the person's finger.

• more

• less

• equal

• None of the above

The broomstick shown is in static equilibrium. The mass to the right of the person's finger is ____________ compared to the mass to the left of the person's finger.

• more

• less

• equal

• None of the above

Tags

NGSS.HS-PS2-1

"A point at which entire weight of object concentrated toward the earth".

Identify the concept explained in the statement above.

• Free body diagram

• Concurrent forces

• Center of gravity

• Rigid body

If the fulcrum is on the hinge in the picture, which of the following forces are not creating torque.

• Normal force from the wall

• Weight from the rod

• Tension from the string.

Lever arm is another word for all of the following except

• the position where a torque is applied.

• the distance from the fulcrum.

• the length of a rod.

• perpendicular distance from rotational axis.

The figure above shows a uniform meterstick that is set on a fulcrum at its center. A force of magnitude F toward the bottom of the page is exerted on the meterstick at the position shown. At which of the labeled positions must an downward force of magnitude F/2 be exerted on the meterstick to keep the meterstick in equilibrium?

• A

• B

• C

• D

Tags

NGSS.HS-PS2-2

• angular displacement

• angular velocity

• angular acceleration

Which of the following describes how fast you are spinning or rotating about an axis?

• linear speed

• angular displacement

• angular speed

• linear acceleration

According to convention, counter-clockwise is always considered the ______________ direction when rotating.

• positive

• negative

• zero