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.HS-PS3-1

NGSS.HS-PS3-2

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.HS-PS3-1

NGSS.HS-PS3-2

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-PS3-2

NGSS.MS-PS3-4

NGSS.MS-PS3-5

Which description of motion matches this bar chart?

• The driver of a car slows down on a level roadway

• A golf ball rolls up a hill and comes to a stop

• A skydive falls at constant speed

• A girl on a sled starts at rest on a hill then slides down

Which description of motion matches the bar chart?

• A car moves along a level roadway at constant speed

• A baseball player slides into second base coming to a stop

• A ski lift lifts a rider at constant speed from the bottom to the top of a mountain

• Starting from rest a marble rolls down a ramp

Which description of motion matches the bar chart?

• A baseball player slides into second base and comes to a stop

• From the top of a hill, a skier uses her poles to help her ski down the hill with no friction

• A car is accelerating from rest on a level road

• A golf ball is rolling up a hill with some resistance from the grass

Tags

NGSS.HS-PS2-1

Which description of motion matches the bar chart?

• A driver hits the breaks to slow down to the speed limit

• A car is moving along a level roadway at constant speed

• A skydiver fall to the ground at constant speed

• A baseball player slides into second base and comes to a stop

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-2