Physics - Newton's Laws

A car is driving at a constant velocity of 75 m/s on the highway headed to Tucson, on a windy day. What is the force acting upon it to continue it's state of motion?

• 0 N, due to "the constant velocity" which means the car is already moving. It does not need force to continue it's state of motion.

• Really? This question again? Obviously it is 75 m/s because of one of Newton's Laws.

• Wait, I do know, I just don't know how to explain it. But, It is one of the laws... right?

• 75 N to the right, due to action and reaction, as well as inertia.

If an object is stationary (not moving) the forces acting upon it are---

• Balanced
• Unbalanced
• Weak
• Hulk Smash?

A student leaves a pencil on a desk and it stays there until I pick it up. 

• 1st Law
• 2nd Law

The combination of all the forces acting on an object is the...

• net force
• action force
• reaction force
• balance force

"An object in motion (or at rest) will to stay in motion (or at rest) until an outside force acts upon it."

• Newton's 1st Law
• Newton's 2nd Law
• Newton's 3rd Law
• Newton's 4th Law

Monica is riding her favorite roller coaster at the amusement park. During a drop, Monica is pushed back into her seat with great force. Which of Newton's Laws of Motion BEST describes why this is happening?

• Newton's First Law

• Newton's Second Law

• Newton's Third Law

• None of Newton's Laws describe this scenario

What is the net force of the object?

• 10 N
• 25 N
• 5 N
• 0 N

A rocket is launching on a mission to the International Space Station. Upon takeoff, a large jet of fire comes from the bottom of the spacecraft towards the ground. The rocket then begins to move towards the sky.

• 1st Law of Inertia

• 2nd Law of Acceleration

• 3rd Law of Action-Reaction

Jessie's class is going on a field trip to a science museum 30 miles from her school. When the school bus merges onto the freeway, the speed of the bus suddenly increases and Jessie is pushed into the back of her seat.

• 1st Law of Inertia

• 2nd Law of Acceleration

• 3rd Law of Action-Reaction

A large semi-truck carrying a heavy load and a small sports car both stop at a red light. The sports car requires less force to stop at the light than the large truck.

• 1st Law of Inertia

• 2nd Law of Acceleration

• 3rd Law of Action-Reaction