Ch. 14.1 - Work & Power

Ch. 14.1

Work & Power

Fill in the Blanks

In science, work is done when a(n)

acts on an object in the direction the object moves.

Open Ended

Why isn't work being done on a barbell when a weight lifter is holding the barbell over his head?

Multiple Choice

True or False? A vertical force does work on an object that is moving in a horizontal direction.

• True

• False

Fill in the Blanks

In science, work that is done on an object can be described as the force acting on the object multiplied by the

the object moves.

Multiple Choice

Select the correct equation to use when trying to calculate distance from the work and force on an object.

• Distance = Force x Work

• Distance = Force / Work

• Distance = (Force)²

• Distance = Work / Force

Fill in the Blanks

The SI unit of work is the

.

Multiple Choice

True or False? Power is the rate of doing work.

• True

• False

Multiple Select

Select each sentence that is true about power.

• Power and work are always equal.

• You can increase power by doing a given amount of work in a shorter period of time.

• When you decrease the force acting on an object, the power increases.

• When you do less work in a given time period, the power decreases.

Fill in the Blanks

The SI unit of power is the

.

Multiple Choice

Select the expression that is equivalent to one watt.

• one newton per meter

• one joule per meter

• one newton per second

• one joule per second

Multiple Choice

Select the quantity that is approximately equal to one horsepower.

• 746 J

• 746 W

• 7460 N/m

• 7460 J