Module 6: Applications of Newton's Second Law

Question 1

Define Translational Equilibrium

Answer 1

An object is said to be in translational equilibrium when the sum of the forces acting on it is equal to zero.

Question 2

Define Static Equilibrium

Answer 2

When an object is at rest, it is said to be in static equilibrium.

Question 3

Define Dynamic Equilibrium

Answer 3

When an object moves with a constant velocity, it is said to be in dynamic equilibrium.

Question 4

Define Tension

Answer 4

The force from a tight string, rope, or chain. This force is directed away from the object to which the string, rope, or chain is anchored.

Question 5

Define Translational Motion

Answer 5

Motion from one point to another which does not involve repeatedly passing the same point in space

Question 6

Define Rotational Motion

Answer 6

Motion around a central axis such that an object could repeatedly pass the same point in space relative to that axis

Question 7

Define Lever Arm

Answer 7

The length of an imaginary line drawn from the axis of rotation to the point at which the force is involved

Question 8

Define Torque

Answer 8

The tendency of a force to cause rotational acceleration. The magnitude of the torque is equal to the length of the lever arm times the component of the force that is applied perpendicular to it.

Question 9

Define Rotational Equilibrium

Answer 9

The state in which the sum of the torques acting on an object is zero.

Question 10

What is the torque formula?

Answer 10

τ = F> * r
τ –> Torque
F> –> Applied force perpendicular to the lever arm
r –> Length of the lever arm