Statics

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

• ∑τ=0

• Constant acceleration

• ∑F=0

• Positive forces only

All the forces rotating counterclockwise will have a _______ torque

• positive

• negative

The formula used to find a torque is...

• (m)(g)

• (F) cos(Ɵ)

• (F)(r)

• (m)(a)

All the forces rotating clockwise will have a _______ torque

• positive

• negative

Giving the following image, the force is...

• counter clockwise (positive)

• clockwise (negative)

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.HS-PS2-1

If the x component and y component of a vector are 34 N and 20 N respectively, the magnitude of the vector will be...

• 54N

• 1000 N

• 39.44 N

• 1556 N

The torque of a 50 N force 20 cm away from the pivont point will be...

• 500 N

• 20 Nm

• 10 Nm

• 15 Nm

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.HS-PS2-1