Work - BrainPop

Which of the following is a true statement about work?

• It measures how quickly an object accelerates

• It measures how much effort is applied over a certain distance

• It measures the change in an object's rate of speed

• It measures how much time it takes to move a massive object

When is positive work done?

• When a force moves an object in a direction parallel to that force

• When a force moves an object in a direction perpendicular to that force

• When a force moves an object in a direction opposite to that force

• When a force causes a moving object to slow down

What does one newton exerted over a distance of one meter equal?

• one watt

• one hertz

• one volt

• one joule

A kid applies a force of 70 N to a ball over 1.1 meters. How much work did he do to the ball?

• 77 J

• 7.7 J

• 0.7 J

• 770 J

Tags

NGSS.HS-PS3-1

A weightlifter lifts 600 newton weights 1.5 meters off the ground. How much work has he done?

• 600 J

• 660 J

• 900 J

• 1200 J

Tags

NGSS.HS-PS3-1

An object falls 5 meters with a force of 980 newtons. How much work has gravity done?

• 4,900 J

• 980 J

• 49 J

• 490 J

320 joules of work were done by a force of 80 newtons. Over what distance was the force applied?

• 80 m

• 44 m

• 40 m

• 4m

800 joules of work were done with a force of 200 newtons. Over what distance was the force applied?

• 40m

• 20m

• 4m

• 2m

A box required 800J of work to lift five meters off the ground, How many newtons did the box weigh?

• 40 N

• 160 N

• 80 N

• 16 N

Tags

NGSS.HS-PS2-1

Simple machines make work easier by increasing what?

• The distance over which work is done.

• The force needed to do work.

• The time required to do work.

• The acceleration of a massive object.