Forces & Newton's Laws

Check all the options that have an unbalanced force.

• A plate sitting on the table.

• A person rocking back & forth in a rocking chair.

• A ball accelerating down a ramp.

• A train traveling at a steady 40 mph.

• Leaning against a wall.

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NGSS.MS-PS2-2

How would you solve for the acceleration of a 20 kg box being moved with 50 N?

• 50N x 20 kg

• 20 kg / 50N

• 20 kg + 50N

• 50N / 20 kg

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NGSS.MS-PS2-2

What is the net force being applied to the crate?

• 10 N to the left

• 70 N to the left

• 10 N to the right

• 70 N to the right

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NGSS.MS-PS2-2

Check all the examples that demonstrate Newton's 1st Law of Inertia.

• 
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• 
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NGSS.MS-PS2-2

How fast would this box be accelerating and in which direction? (Look at the units to decide how to solve)

• .67 m/s² to the left

• .67 m/s² to the right

• 3.33 m/s² to the right

• 3.33 m/s² to the left

Tags

NGSS.MS-PS2-2

Which law is this demonstrating?

• 3rd law because they move in opposite directions with the same force.

• 1st law because the cannon moves slower due to having more mass.

• 2nd law because the cannon doesn't move until an unbalanced force is applied.

• 4th law because cannons go boom.

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NGSS.MS-PS2-1

What happens to a ball that is rolling on the smooth sidewalk and then into the thick grass?

• The ball speeds up due to an increase in friction.

• The ball slows down due to a decrease in friction.

• The ball slows down due to an unbalanced force.

• The ball stays moving at a constant rate due to an unbalanced force.

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NGSS.MS-PS2-2

A nine kilogram ball is rolling at six meters per second per second, so the force applied is ___________ Newtons.

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NGSS.MS-PS2-2

Which of the following explains the money on the elbow grab trick?

• When you move your elbow it adds a balanced force on the money so they stay still.

• It is just plain wizardry.

• Moving your elbow places an unbalanced force on the money in an equal & opposite direction.

• When you remove your elbow the money wants to remain at rest until gravity pulls it down.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

A 4.5 kg tuba is being carried with 18 N so it is accelerating at a rate of ___________ m/s². (Look at the units given to solve)

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NGSS.MS-PS2-2