Motion Laws in Real Life

When you push a book across a table and let go, it eventually stops because of:

• Gravity pulling it downwards

• It runs out of energy

• Friction between the book and the table

• Air resistance

According to Newton's first law of motion, what will happen to a car moving at a constant velocity if no external force is applied?

• It will gradually slow down

• It will continue moving at the same velocity

• It will accelerate

• It will immediately stop

In a car crash, why is it important for passengers to wear seat belts?

• To increase the car's speed

• To reduce the friction between the passenger and the seat

• To provide a force that counteracts the inertia, keeping the passenger in place

• To make the car more aerodynamic

Tags

NGSS.MS-ETS1-1

When a soccer player kicks a ball, the action force is the foot pushing on the ball. What is the reaction force?

• The ball pushing back on the foot

• The ball moving forward

• The ground pushing up on the player

• The air resistance against the ball

Tags

NGSS.MS-PS2-1

• The acceleration decreases

• The acceleration remains constant

• The acceleration increases

• The acceleration is zero

Tags

NGSS.MS-PS2-2

Why do passengers feel pushed back into their seats when a roller coaster starts moving quickly?

• Because of the increase in gravitational force

• Due to the inertia resisting the change in motion

• Because of the decrease in friction

• Due to the air resistance against them

During a tug of war, when two teams pull on the rope with equal force but the rope does not move, this is an example of:

• Newton's first law of motion in action

• Newton's second law of motion being violated

• Newton's third law of motion demonstrating action and reaction forces

• None of the above

What is the unit for FORCE? (a)  

• N (Newtons)
• lbs (pounds)
• g (grams)
• m/s (meters per second)

Balanced or Unbalanced? (a)  

• Balanced 
• Unbalanced

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Forces that have a net force of zero (a)  

• Balanced force
• Unbalanced force

Tags

NGSS.3-PS2-1