PS energy work and power

Name first and last

what of the following is the sum of the kinetic and potential energy?

• total energy
• mechanical energy
• chemical energy
• radiant energy

the main difference between kinetic and potential energy is that

• kinetic involves position and potential involves energy in motion
• kinetic involves motion and potential involves poitsion
• although both energies involve motion, only kinetic involves position
• although both energies involve position only potential involves motion

what type of energy does a rubber band have?

• radiant
• chemical
• elastic
• mechanical

a man pushes a crate along a factory floor by exerting a force of 55N. if the crate moves a distance of 4.0m how much work does the man perform?

• 165 J
• 220J
• zero J
• 145J

How much work is done when an object weighing 6 N is lifted 5 m?

• 5J
• 6J
• 30J
• 300J

Tags

NGSS.MS-PS3-2

NGSS.MS-PS2-2

The two factors that determine how much kinetic energy a moving object has are:

• a. power and distance
• b. velocity and mass
• c. velocity and power
• d. velocity and time

Tags

NGSS.MS-PS3-1

In the diagram below, a roller coaster car starts from rest at point A and moves along the track. At which point does the roller coaster car have the greatest kinetic energy?

• Point A
• Point B
• Point C
• Point D

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

Based on the diagram below, which of the following is the correct sequence of energy changes needed to produce energy for the hair dryer?

• Heat 🡪 Mechanical 🡪 Chemical 🡪 Electrical
• Chemical 🡪 Heat 🡪 Mechanical 🡪 Electrical
• Electrical 🡪 Mechanical 🡪 Heat 🡪 Chemical
• Chemical 🡪 Mechanical 🡪 Heat 🡪 Electrical

Tags

NGSS.MS-PS3-5

NGSS.MS-PS3-4

which of the following does not make use of electrical energy?

• piano
• radio
• toaster
• digital camera