When an object is in motion, it possesses kinetic energy.
3. When an object is in motion, it possesses what type of energy?
(1 point)
•
chemical energy
kinetic energy
• potential energy
thermal energy
9 answers
5. An object's gravitational potential energy depends on the object's mass, the strength of the gravitational field, and what other variable?
(1 point)
• the speed of the object
• the color of the object
• the shape of the object
• the object's height from the ground
(1 point)
• the speed of the object
• the color of the object
• the shape of the object
• the object's height from the ground
An object's gravitational potential energy depends on the object's mass, the strength of the gravitational field, and the object's height from the ground.
6. If you are at an amusement park and you ride a slingshot, how does your potential energy compare to your kinetic energy at the top of the shot?
(1 point)
• The kinetic energy is twice the amount of potential energy.
• Kinetic energy is greater than potential energy.
• The kinetic energy and potential energy are the same.
• The kinetic energy is less than potential energy.
(1 point)
• The kinetic energy is twice the amount of potential energy.
• Kinetic energy is greater than potential energy.
• The kinetic energy and potential energy are the same.
• The kinetic energy is less than potential energy.
At the top of the shot on a slingshot, the kinetic energy is less than potential energy. At that point, you are at the maximum height, which means the gravitational potential energy is at its highest, while your speed (and thus kinetic energy) is at its lowest.
10. Kim is upstairs, but walks downstairs to the kitchen for a snack.
Which statement correctly describes the types of energy she has at the top of the stairs and as she walks down the stairs? (1 point)
potential energy at the top of the stairs; potential energy as she walks down
potential energy at the top of the stairs; kinetic energy as she walks down
Kinetic energy at the top of the stairs; kinetic energy as she walks
kinetic energy at the top of the stairs; potential energy as she walks down
Which statement correctly describes the types of energy she has at the top of the stairs and as she walks down the stairs? (1 point)
potential energy at the top of the stairs; potential energy as she walks down
potential energy at the top of the stairs; kinetic energy as she walks down
Kinetic energy at the top of the stairs; kinetic energy as she walks
kinetic energy at the top of the stairs; potential energy as she walks down
The correct statement is: potential energy at the top of the stairs; kinetic energy as she walks down.
At the top of the stairs, Kim has gravitational potential energy due to her height. As she walks down, her potential energy decreases while her kinetic energy increases because she is in motion.
15. Betsy uses an electric alarm clock to wake up for school. What energy transformation happens in the alarm clock to help her wake up? (1 point)
• electrical energy converts to heat energy
• sound energy converts to kinetic energy
• electrical energy converts to sound energy
• chemical energy converts to electrical energy
• electrical energy converts to heat energy
• sound energy converts to kinetic energy
• electrical energy converts to sound energy
• chemical energy converts to electrical energy
The correct answer is: electrical energy converts to sound energy.
The alarm clock uses electrical energy to produce sound, which helps wake Betsy up.