Ch 14 ICP QUIZ

1.

1 point

when friction is reduced in a machine, the efficiency increases

True

False

2.

1 point

V-_________is the product of force and distance

power

work

joule

3.

1 point

The _____________is the SI unit of _________

meter, distance

joule, work

newton, work

4.

1 point

Ideal mechanical advantage will occur in the absence of

work

power

friction

5.

1 point

V-______________is equal to about 746 watts.

joule

horsepower

watt

6.

1 point

V-____________is the rate of doing work

work

horsepower

power

7.

1 point

V-_______________________The percentage of work input that becomes work output of a machine

work output

efficiency

ideal mechanical advantage

8.

1 point

V-_________is teh Si unit of work

Newton

Watt

Joule

9.

1 point

V-_________________is a device that changes force

horse

input distance

machine

10.

1 point

Power is measured in

Watts

Newtons

Joules

11.

1 point

Machines change

force

power

work

12.

1 point

Kyle inputs 3000 W of power into his boat. Will the boat operate on the water with this much power?

No

Yes

13.

1 point

When you know the input distance and output distance, you should be able to calculate the ________________

actual mechanical advantage

mechanical advantage

ideal mechanical advantage

14.

1 point

to increase power, you can ________________the amount of work you do in a given amount of time, or you can do a given amount of work in __________ time

decrese, less

increase, less

increase, more

decrease, more

15.

1 point

a 6000 newton barbell is held over one’s head. The lifter lifts it 3 meters above their head; what is the amount of work done?

2000

18000

3200

16.

1 point

because friction is almost always present, efficiency of a machine is always ___________than 100%

less

greater

equal

17.

1 point

V-___________________is the work done by the input force acting through the input distance

work input

input force

work output

18.

1 point

What is this the formula for? Work = force(newtons) X distance(meter)

distance

force

work

19.

1 point

machines are capable of _____________ the amount of ____________________needed

multiplying, force

dividing, force

dividing, power

multiplying, power

20.

1 point

V-______________the force you exert on a machine

output force

input distance

input force

21.

1 point

V-________________is the mechanical advantage in the absence of friction

ideal mechanical advantage

effieciency

actual mechanical advantage

22.

1 point

The following is the formula for what? Output force/input force

mechanial advantage

ideal mechanical advantage

actual mechanical advantage