Newton's Laws of Motion

Which is always a contact force?

• electric
• friction
• magnetic
• gravity

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.

What pulls a ball back to earth?

• Balanced forces
• Gravity
• Friction
• Inertia

Tags

NGSS.MS-PS2-4

A(n) __________ is a push or pull.

• newton
• acceleration
• force
• momentum

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-1

An object at rest will _______ if no outside forces are applied.

• Stay at rest
• Increase velocity
• Decrease mass
• Change direction

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NGSS.MS-PS2-2

The SI units for force are...

• Kilograms
• Newtons
• Meters per second
• Pounds

A car and a truck are traveling at the same speed. As they slow down, the truck takes longer to stop. Why? 

• Newton’s first law of motion for objects at rest.
• Newton’s first law of motion for objects in motion.
• Newton’s second law of motion.
• Newton’s third law of motion.

Tags

NGSS.MS-PS2-2

A sled sliding on a flat, icy surface with a constant velocity is best described by __________________________.

• none of these. 
• Newton’s first law of motion.
• Newton’s second law of motion.
• Newton’s third law of motion.

Which of the following explains the difference between speed and velocity?

• One has motion, and the other does not.
• One has direction, and the other does not.
• One involves time, and the other does not.
• One involves acceleration, and the other does not.

The gravitational pull is greater between two objects that

• have greater masses.
• have rougher surfaces.
• are farther apart.
• are moving at greater speed.

Tags

NGSS.MS-PS2-4