3rd Quarter Quarterly Exam Review

Which of the following indicates increased stability?

• tall object

• slim base

• low center of gravity

• high center of gravity

When is an object in a state of static equilibrium?

• when the object is at rest

• when the object moves at constant speed

• when the net torque of the object is zero

• when the net force of the object is less than zero

When is an object in a state of translational equilibrium?

• when the object is at rest

• when the object is moving at constant velocity

• when the net force of the object is zero

• when the net torque of an object is zero

What is a pivot point?

• the point where an object rotates about an axis

• the point where the mass of the object is concentrated

• the point where the weight of the object acts upon

• The pint where the object is the heaviest

What forces act on a hanging object that allow it to achieve a state of equilibrium?

Ignore air resistance.

• normal force and gravitational force

• gravitational force and weight

• weight and normal force

• weight and tension

Which of the following will increase the magnitude of a torque?

• increased moment arm

• decreased pivot point

• increased angle of force

• decreased angle of the force

At what angle does a force produce the maximum torque?

• 45 degrees

• 90 degress

• 180 degrees

• 360 degrees

Which of the following DOES NOT satisfy the first condition for equilibrium?

• a resting on a table without sliding

• a man pushing a stationary car and it starts moving

• a seesaw perfectly balanced with equal weights on both sides

• a hanging sign that remains still despite being exposed to wind

Which of the following is NOT considered a contact force?

• applied force

• air resistance

• graviational force

• None of the above

Which of the following is NOT considered a non-contant force?

• nuclear force

• electrical force

• magnetic force

• none of the above