Statics

As a student runs a plastic comb through her hair, the comb acquires a negative electric charge. This charge results from the transfer of

• protons from the comb to her hair

• protons from her hair to the comb

• electrons from the comb to her hair

• electrons from her hair to the comb

The diagram below shows the electric field in the vicinity of two charged conducting spheres, A and B. What is the static electric charge on each of the conducting spheres?

• A is positive and B is negative.

• Both A and B are positive.

• Both A and B are negative.

• A is negative and B is positive

Tags

NGSS.HS-PS2-4

When a particle is in equilibrium, the sum of forces acting is equal to

• external forces

• internal forces

• zero

• moment

Draw the Free-body diagram of the particle A shown in the Figure

Tags

NGSS.HS-PS2-1

Draw the FBD for the particle C as shown in the Figure

Tags

NGSS.HS-PS2-1

Determine the tension developed in wires CA and CB required for equilibrium of the 10-kg cylinder. Take angle θ = 40°

• F_CA = 80.0 kN

  F_CB = 90400 N

• F_CA = 80.0 N

  F_CB = 90400 N

• F_CA = 80.0 N

  F_CB = 90.4 N

• F_CA = 80.0 kN

  F_CB = 90.40 N

Tags

NGSS.HS-PS2-1

Balanced or unbalanced?

• balanced

• unbalanced

Tags

NGSS.HS-PS2-1

Name the missing force...

• weight force

• normal force

• applied force

• frictional force

Tags

NGSS.HS-PS2-1

Name the missing force...

• frictional force

• weight force

• thrust

• buoyant force

Tags

NGSS.HS-PS2-1

Name the missing force...

• push

• weight force

• tension force

• drag

Tags

NGSS.HS-PS2-1