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• The cart moved 24 m away from the starting point between 2 s and 5s.

• The cart moved toward the starting point at a speed of 3m/s between 7 s and 12 s.

• The cart moved 11 m toward the starting point between 8 s and 10 s.

• The cart moved away from the starting pint at a speed of 1 m/s for 2 s.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

NGSS.MS-PS3-1

​ (a)  

• chemical to electrical to mechanical

• chemical to mechanical to electrical

• electrical to chemical to mechanical

• mechanical to electrical to chemical

​ (a)  

• chemical to thermal to mechanical

• mechanical to light to chemical

• chemical to mechanical to thermal

• thermal to chemical to light

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Tags

NGSS.MS-PS2-2

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Tags

NGSS.MS-PS2-2

Tags

NGSS.MS-PS2-2

What is the net force?

• 5 N

• 45 N to the left

• 5 N to the right

• 45 N to the right

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Is it BALANCED? 

• Yes

• No

A 50 kg skater pushed by a friend accelerates 5 m/s².  How much force did the friend apply? The answer to this question is most likely (HINT: Look at the units!!!) - 

• 250 N

• 250 m/s²

• 250 kg 

Tags

NGSS.MS-PS2-2

Rockets are launched into space using jet propulsion where exhaust accelerates out from the rocket and the rocket accelerates in an opposite direction.

• The Law of Inertia

• The Law of Acceleration

• The Law of Action/ Reaction

Tags

NGSS.MS-PS2-1