U5: 3E Forces and Motion mastery check

Which of the following best defines a balanced force?

• Forces that cause an object to move in a circle

• Forces that are equal in size and opposite in direction, resulting in no change in motion

• Forces that always cause acceleration

• Forces that act only on moving objects

What is the formula for Newton's 2nd Law of Motion?

Tags

NGSS.MS-PS2-2

Which of the following is an example of unbalanced forces acting on an object?

• Two people pushing a box from opposite sides with equal force

• A book resting on a table

• A car accelerating when you press the gas pedal

• A hanging picture staying still on a wall

Tags

NGSS.MS-PS2-2

Tags

NGSS.MS-PS2-2

A box is at rest on a flat surface. If you push it with a force of 20 N to the right and friction provides a force of 20 N to the left, what will happen to the box?

• It will move to the right

• It will move to the left

• It will stay at rest

• It will move up

Tags

NGSS.MS-PS2-2

A student claims that if two forces of 10 N and 15 N act in opposite directions on an object, the object will not move. Do you agree or disagree? Explain your reasoning.

• Agree, because the forces are balanced

• Disagree, because the net force is 5 N and the object will move in the direction of the larger force

• Agree, because the object is at rest

• Disagree, because the forces cancel each other completely

Tags

NGSS.MS-PS2-2

A soccer ball is at rest. Two players kick it at the same time: one applies a force of 30 N east, and the other applies a force of 20 N west. What will happen to the ball, and why?

• The ball will stay at rest because the forces are balanced

• The ball will move east because the net force is 10 N east

• The ball will move west because the net force is 10 N west

• The ball will move in both directions

Tags

NGSS.MS-PS2-2

Match the following

• Parked Car

• Balanced

• Dean rolling down a hill

• Unbalanced

• Water bottle on a desk

• Balanced

• A Hoover Board riding downhill

• Unbalanced

• Ms. K sitting at her desk

• Balanced

Tags

NGSS.MS-PS2-2

Mathematical Equivalence

ON

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NGSS.MS-PS2-2

A 10 kg object is subjected to a net force of 50 N. What is the acceleration of the object?

Mathematical Equivalence

ON

Tags

NGSS.MS-PS2-2