AP Torque and Equilibrium

Calculate [H₂O] if K_eq = 1.2,[CO₂] = 0.846M, and [CH₄]= 0.0713M4CuO_(s) +CH_4(g) ⇌ CO_2(g)+4Cu_(s) +2H₂O_(g)

• 0.101 M

• 0.318 M

• 0.0102 M

• 3.77 M

A rod on a horizontal tabletop is pivoted at one end and is free to rotate without friction about a vertical axis, as shown in the diagram.  A force F is applied at an angle θ to the rod.  If F were to be applied perpendicular to the rod, at what distance from the axis should it be applied in order to produce the same amount of torque?

• L sin θ

• L cos θ

• L 

• L tan θ

A block of mass 3.0 Kg is suspended from a string, causing it to stretch 12cm before reaching equilibrium, as shown in the image.
The 3.0 Kg block is replaced with a 4.0 Kg block and it is released from the position shown above, at which the spring is unstretched.
How far will the 4.0 Kg block fall before the direction is reversed?

• 9 cm

• 18 cm

• 24 cm

• 32 cm

Tags

NGSS.HS-PS2-1

What force does not cause any torque?

• Force perpendicular to the fulcrum.

• Force horizontal to the planck.

• Force slightly off center of the fulcrum

• Forces at a 45 degree angle to the fulcrum, and not on the fulcrum

What is the Unit for Torque

• Nm

• N

• W

• J

Torque is the product of a force exerted on an object times the lever arm.

• True 

• False

When an object is experiencing a net torque

• it is in dynamic equilibrium.

• it is in static equilibrium.

• it is rotating.

• it is translating.

What is the weight of the package?

• 5 N

• 10 N

• 15 N

• 20 N

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-4

What is the formula for calculating torque?

In a balanced seesaw, if one side has a weight of 20 N at a distance of 2 m from the pivot, what is the torque?

• 40 Nm

• 20 Nm

• 10 Nm

• 5 Nm