Newton's laws of motion

A student pushes a box to right with a force of 10N while a young boy pushes the box to the left with a force of 8N. What is the sum of all forces on the box? 

• 18N left
• 18N right
• 2N right
• 2N left

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NGSS.MS-PS2-2

If net force acting on object is 0, then the force is considered to be..

• Balanced
• Unbalanced
• Equal in Direction
• Distance/Time

What is Newton's First Law

• F=ma
• Every action has an equal and opposite reaction
• An object at rest stays at rest, an object in motion stays in motion. 
• Friction 

Two objects are connected by a rope over a pulley.  According to Newton's Second Law of Motion, the masses will start to move if the

• acceleration of object 1 is greater than acceleration of object 2
• acceleration of object 2 is greater than acceleration of object 1
• mass of object 1 is greater than the mass of object 2
• mass object 2 is greater than the mass of object 1

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NGSS.MS-PS2-2

Which statement best explains Newton's Third Law of Motion?

• An object at rest tends to stay at rest.
• For every action there is an equal and opposite reaction.
• The acceleration of an object is based on the force applied.
• An object continues its motion until an unbalanced force is applied.

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NGSS.MS-PS2-1

A man hits a 0.2 kg golf ball causing it to accelerate at rate of 20 m/s². Calculate the force used on the golf ball.

• 4 N
• 100 N
• 0.01 N
• 20.2 N

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NGSS.MS-PS2-2

When the air is released from a balloon, the air moves in one direction, and the balloon moves in the opposite direction. Which law best explains the motion of the balloon?

• Newton's Law of Inertia
• Newton's Law of F=ma
• Newton's Law of Force Pairs
• Newton's Law of Biology

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NGSS.MS-PS2-1

Calculate the acceleration of the tire in the diagram.

• 5.3 m/s²
• 0.2 m/s²
• 12.0 m/s²
• 9.8 m/s²

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NGSS.MS-PS2-2

A 10-kg brick and a 1-kg book are dropped in a vacuum. The force of gravity on the 10-kg brick is

• 10 times as much as the force on the 1-kg book
•  zero.
• the same as the force on the 1-kg book.
• none of the above

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NGSS.MS-PS2-4

What is the difference between mass and weight?

• mass is how much matter is in an object, and weight is the gravitational pull on that object
• mass and weight are the same
• weight affects how much mass is in an object
• weight is determined by how many atoms make up an object