static equilibrium balance calculations

If a system is in static equilibrium, it must have the following 2 conditions:

• ∑τ=0

• Constant acceleration

• ∑F=0

• Positive forces only

The formula used to find a torque is...

• (m)(g)

• (F) cos(Ɵ)

• (F)(r)

• (m)(a)

Giving the following image, there are _____ forces acting on the sytem.

• 3 forces (weight 1, weight 2, and distance 2)

• 2 forces(weight 1 and weight 2)

• 1 force (weight 1)

• 1 force ( weight 2)

Tags

NGSS.MS-PS2-4

If the kid on the left weights 490 N, 0.5m away from the pivont point, then the second kid must have____________ in order to keep it in static equilibrium

• 340 N, 0.1 m away from the pivont point to the right

• 220 N, 0.2 m away from the pivont point to the left

• 490 N, 0.5m away from the pivont point to the right

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-1

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

Does a bridge anchored resting on two pillars have any torque?

• No, it isn't moving
• Yes, but it is at equilibrium
• Yes, but it will soon break because of the torque
• No, Bridges can't have torque

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-1

What is the weight of the package?

• 5 N
• 10 N
• 15 N
• 20 N

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-1

NGSS.MS-PS2-4

What is the weight of the package?

• 5 N
• 10 N
• 15 N
• 20 N

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-1

NGSS.MS-PS2-4

What is the weight of the package?

• 5 N
• 10 N
• 15 N
• 20 N

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-1