Gen Oral Prep

Question 1

What formula is used to find the amount of work done when an object is moved across a floor?

Answer 1

Work= Force X Distance

Question 2

what determines the mechanical advantage of an arrangement of ropes and pulleys?

Answer 2

The number of ropes supporting the weight

Question 3

What determines the mechanical advantage of a gear train?

Answer 3

The ratio between the number of teeth on the drive gear and the number of teeth on the driven gear

Question 4

The difference between velocity and speed

Answer 4

1. Speed is how fast an object is moving, or how far the object will travel in a specified time
2. Velocity denotes both the speed of an object and the direction in which the object moves

Question 5

Explain the right hand motor rule

Answer 5

It is a mnemonic used to determine the direction of the force on the current-carrying conductor within a magnetic field. Its crucial for understanding how electric motors work.
1. Thumb points in the direction of force
2. The index finger is pointed in the direction of flux/magnetic field
3.The middle finger is pointed in the direction of current flow

Question 6

What is force?

Answer 6

The intensity of an input
Force= Mass x Acceleration

Question 7

Define work

Answer 7

Work is accomplished only when an object is displaced some distance against a resistive force

Question 8

What is power?

Answer 8

How long it takes to accomplish work
Power=force times distance divided by time

Question 9

What is one horsepower equal to?

Answer 9

1hp equals 550 ft lbs/ sec
33,000 ft lb/ minute
375 mile pounds/ hour
746 watts

Question 10

Define motion

Answer 10

Continuinous change of position or place, or the process in which a body undergoes displacement

Question 11

Define acceleration

Answer 11

The rate of change of velocity

Question 12

How do you calculate speed?

Answer 12

Distance traveled divided by elasped time

Question 13

Newton’s laws of motion

Answer 13

1.objects at rest tend to stay rest and objects in motion tend to stay in motion
2. Force is equal to the product of an object’s mass and its acceleration
3.for every action, there is an equal and opposite reaction

Question 14

Defien velocity

Answer 14

The rate of motion in a particular direction

Question 15

Torque vs work

Answer 15

Work is force that acts through a distance while torque is force acting a long a distance

Question 16

Whatvis friction?

Answer 16

The opposition to relative movement between two objects in contact with each other