Forces and Energy Review

(T or F?) A balanced force is only an object that is not moving. 

• True 
• False

If an object is stationary (not moving) the forces acting upon it are _____________

• unbalanced
• weak
• balanced
• Hulk Smash!

Tags

NGSS.MS-PS2-2

The force that pulls things toward earth.

• Friction

• Gravity

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NGSS.5-PS2-1

Which one is balanced?

• top
• bottom
• both

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NGSS.MS-PS2-2

With unbalanced forces, the object will move in the direction of the _______ force.

• larger 
• smaller 
• equal 
• cannot be determined

Tags

NGSS.MS-PS2-2

At which letter is potential energy the highest? (6.8A)

• b

• c

• a

• d

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NGSS.MS-PS3-2

At which letter is kinetic energy the highest? (6.8A)

• a

• b

• c

• d

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NGSS.MS-PS3-1

NGSS.MS-PS3-5

When a lion eats a zebra and then uses the energy from the zebra to run, the lion's body converts-(6.9C)

• chemical energy to mechanical energy

• electrical energy to chemical energy

• chemical energy to light energy

• mechanical energy to chemical energy

As a boulder rolls from the top of the hill to the bottom, how does its potential and kinetic energy change? (6.8A)

• Potential and kinetic energy both increase

• Potential increaes and kinetic decreases

• Potential decreases and kinetic increases

• Potential and kinetic energy both decrease

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-5

______________ is a force that always acts in the direction opposite of motion.

• applied

• friction

• gravity

• normal