Work, Energy, Conservation

The faster an object moves, the ________ kinetic energy it has. 

• more
• less
• none of the above
• all of the above 

Which is the best example that something has kinetic energy?

• a. a car parked on a steep hill 
• b. a tennis ball rolling across the court
• c. a picture hanging on the wall 
• d. a piece of coal before it's burned 

Tags

NGSS.HS-PS3-2

At which point on the roller coaster is the gravitational potential energy the greatest?

• W

• X

• Y

• Z

Tags

NGSS.MS-PS2-4

NGSS.MS-PS3-2

What is the gravitational potential energy of an 85 kg mountain climber at the summit of a 6267 m volcano?

Let g = 9.8m/s²

• 5,220,411 J

• 532,695 J

• 73.7 J

• 54,356.6 J

Tags

NGSS.HS-PS3-2

You drop a 5 kg ball from a height of 2 m. Just before it reaches the ground, what is the ball's kinetic energy?

• 980 J

• 10 J

• 0.98 N

• 980 N

Tags

NGSS.HS-PS3-1

What is the unit used to measure work?

• Joule
• Watt
• Newton
• Pascal

When work is done, there is always a(n) _______.

• constant rate
• single movement involved
• transfer of energy
• increase in the mechanical advantage

At which point(s) on the roller coaster is the kinetic energy at its maximum?

• A
• B
• C
• D

Tags

NGSS.HS-PS3-2

Work is defined as applying a force on an object that displaces the object in the direction of the applied force. Which of the following IS NOT an an example of work being done on an object?

• A waiter walking with a tray of food that he is holding with his hand under the tray.

• A horse pulling a plow through a field.

• A shopper pushing a cart down the aisle of a grocery sture.

• A weightlifter lifting a barbell above his head.

Which of the following is an instance of negative Work?

• A car skidding to a stop on a roadway surface.

• A student rolling a bowling ball down a bowling lane alley.

• A pitcher throwing a baseball.

• a man pushing a crate across a loading dock.