phlab

It is a state wherein no physical changes occur; it is a state of steadiness.

• Force

• Support force

• Mechanical Equilibrium

• ΣF= 0

The easiest way to open a heavy door  is by applying the force

• Near the hinges               

• Middle of the door

• Far from hinges

• Top of the door

When an object is experiencing a net torque,

• It is rotating

• Static equilibrium

• Dynamic equilibrium

• It is translating

Which of the following statements is correct about static friction?

• Static friction acts toward the direction of the force applied.

• Static friction is always parallel to the object-surface interface.

• Static friction always has the same magnitude for a given object on a given surface no matter what external forces are applied.

• The magnitude of the static friction force depends solely on which horizontal external forces are acting on the object.

Which of the following statements is correct about kinetic friction?

• Our model works for rigid surfaces and objects.

• Our model works for rolling objects.

• Our model works for objects moving at very high speeds.

• Our model depends on the mass of the object.

All fluids are:

• Gases

• Liquids

• Non-metallic

• Gases or Liquids

Which of the following statements is NOT correct?

• a fluid changes it shape easily

• a fluid flows

• a fluid has a definite shape

• molecules of a fluid are free to move past each other

Several cans of different sizes and shapes are all filled with the same liquid to the same depth. Then,

• The pressure on the bottom of each can is the same

• The weight of the liquid on the bottom of each can is the same

• The least pressure is at the bottom of the can with the largest bottom area

• the force of the liquid on the bottom of each can is the same

What happens when unbalanced forces act on an object at rest?

• the object remains at rest

• the object begins moving in the direction of the net force

• the object begins moving in an unpredictable direction

• the object begins moving opposite to the direction of net force

Why would one object have a greater acceleration than another when pushed with the same amount of force?

• The objects have different weights

• The objects have different forces

• The objects are different sizes

• The objects have different masses