Energy Bar Charts

When no friction or external applied forces are present, the total mechanical energy of a system will

• Increase

• Decrease

• Remain Constant

When positive work by an external force is done on a system, the energy of the system will ________.

• Increase

• Decrease

• Remain the same

Tags

NGSS.HS-PS3-1

When negative work (by friction or external forces) is done on a system, the total mechanical energy will ______.

• Increase

• Decrease

• Remain the same

What situation describes the initial (i) and final (f) state shown by the energy bar graph.

• A phone falls from a table (i) to the floor (f)

• A ball is thrown straight up (i) into the air (f)

• A car driving on a flat road (i) accelerates (f)

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-2

NGSS.MS-PS3-5

What situation describes the initial (i) and final (f) state shown by the energy bar graph.

• A student at the top of a hill (i) bikes down the hill (f)

• A student biking towards a hill (i) pedals up a hill at constant speed (f)

• A student biking on a horizontal road (i) pedals to accelerate (f)

• A student biking on a horizontal road (i) loses velocity due to friction (f)

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-4

NGSS.MS-PS3-5

What situation describes the initial (i) and final (f) state shown by the energy bar graph.

• A student running to a downhill slip-n-slide (i) slows down as they approach the bottom(f)

• A student running to a downhill slip-n-slide (i) speed up as they approach the bottom (f)

• A student at rest (i) is dragged by their friend down a slip-n-slide

• A student running to a horizontal slip-n-slide (i) has fun slidding to a stop (f)

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-4

NGSS.MS-PS3-5