Chapter 2.3 Newton's 2nd Law

What is the relationship between the net force applied to an object and the object's acceleration?

• Linear

• Direct

• Quadratic

• Inverse

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NGSS.HS-PS2-1

What is the relationship between the mass of an object and the object's acceleration when a constant net force is applied?

• Linear

• Direct

• Quadratic

• Inverse

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NGSS.HS-PS2-1

Jonathan accelerates away from a stop sign in a car. His eight year old daughter is seated next to him. On whom does the back of the seat exert a greater force?

• Jonathan

• His Daughter

• Neither It is equal force

• It cannot be determined

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NGSS.HS-PS2-1

A block has an acceleration of a when pulled by a string. If two identical blocks are glued together and pulled with twice the original force, their acceleration will be

• 1/4 a

• 1/2 a

• a

• 2 a

• 4 a

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NGSS.HS-PS2-1

A group of students is making model rocket cars. The engines provide a nearly constant thrust force. The cars are very light with the majority of the weight coming from the mass of the fuel in the rocket. As the engine fires, it uses fuel, so the car is much lighter at the end of the run than the start. A student ignites the engine in the car and the car accelerates. As the fuel burns and the car continues to speed up the magnitude of the acceleration will... (Friction and drag can be ignored)

• Increase

• Stay the Same

• Decrease

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NGSS.HS-PS2-1

The y-intercept on an acceleration versus force graph demonstrates... (choose all that apply)

• Rule #1

• Rule #3

• forces cause accelerations

• If no force is applied then the object will not accelerate

• If the object has no mass then there is nothing to accelerate

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NGSS.HS-PS2-1

The y-intercept on an acceleration versus inverse mass graph demonstrates... (choose all that apply)

• Rule #1

• Rule #3

• forces cause accelerations

• If no force is applied then the object will not accelerate

• If the object has no mass then there is nothing (no object) to accelerate

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NGSS.HS-PS2-1

A person is pushing horizontally on a box with a constant force, causing it to slide across the floor with a constant speed. If the person suddenly stops pushing on the box, the box will...

• Immediately come to a stop

• Continue moving at a constant speed for a while, then gradually slow down to a stop

• Immediately change to a slower but constant speed

• Immediately begin slowing down and eventually stop

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NGSS.HS-PS2-1

NGSS.HS-PS2-2

Scallops eject water from their shells to provide a thrust force. The graph shows a smoothed graph of actual data for the initial motion of a 25 g scallop speeding up to escape a predator. What is the magnitude of the net force needed to achieve this motion?

• 0.025N

• 0.5 N

• 2.5 N

• 0.005N

Tags

NGSS.HS-PS2-1

The graph shows an object's acceleration vs force. What is the object's mass?

• 0.25 kg

• 4 kg

• 0.5 kg

• 1 kg

Tags

NGSS.HS-PS2-1