Ch. 14.1 - Work & Power

Ch. 14.1

Work & Power

Fill in the Blank

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 Blank

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 Blank

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 Blank

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