Force and Newton's Laws Quiz

Using two spring scales, students pull on opposite sides of a dynamic cart at rest. 7 Newtons of force is pulling left and 5 Newtons force is pulling right. Describe the motion of the cart?

• The cart will move to the right.

• 
  The cart will move to the left.

• The cart will not move.

• The cart will move up.

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Veronica and her little sister, Monique, are playing on a seesaw. If Veronica weighs 75 pounds, and Monique weighs 60 pounds, which statement is true?

• If they push back and forth for a long time, the seesaw will begin to move on its own through gravity.

• If they both push off the ground with equal force, the seesaw will balance and their heights would be level.

• To lift herself from the ground, Monique will need to push much harder than Veronica because she is lighter.

• If they stop adding force to make the seesaw move, Monique will be in the air and Veronica will be touching the ground.

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Which example best represents an object with balanced forces acting upon it?

• A boat moving through the water.

• A book sitting on a high shelf.

• A wagon rolling down a steep hill.

• A baseball thrown in the air.

The image shows two opposite forces acting on a rolling cart, what can we say is true about the effect of the forces on the cart?

• It cannot be determined without knowing which man is stronger.

• It cannot be determined because one man is taller than the other.

• The forces are unbalanced, and net force on the cart moves it to the left.

• The forces are unbalanced, and net force on the cart moves it to the right.

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The image shows two opposite forces represented in Newtons (N) acting on a rope. What can we say is true if the forces on each side of the rope is doubled to 150 Newtons?

• It cannot be determined without knowing which man is stronger.

• 
  The forces are not balanced, because one man is standing taller than the other.

• The forces are balanced. But, the forces acting on the rope have increased and the rope’s motion is affected.

• The forces are balanced. Thus, there is no change in forces acting on the rope and the rope’s motion is not affected.

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How does Newton describe the dependence of acceleration of a body on its mass and the net applied force?

• An object in motion tends to accelerate unless acting upon by an external force.

• Mass and inertia accelerate with the applied force due to the unbalanced forces.

• Every action of force has an equal and opposite reaction applies to the acceleration..

• The acceleration of the object are directly proportional to the force applied.

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Newton's First Law of Motion states that an object will remain at rest or in uniform motion in a straight line unless acted upon by an external force change the motion. This is sometimes called the law of

• acceleration

• force

• inertia

• uniformity

Kimberly, Alex, and Fernando built small sailboats in science class. Their boats have the following weights:

Kimberly: 150 grams
Alex: 175 grams
Fernando: 200 grams

Think about how much force is needed to move each boat. Which correctly lists the boats in order from the most to least amount of force needed to move them?

• Fernando, Alex, Kimberly

• Alex, Kimberly, Fernando

• Kimberly, Alex, Fernando

• Kimberly, Fernando, Alex

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While driving down the road, this tiny hummingbird hit the windshield of a Maria's car. This is a clear case of Newton's third law of motion. The hummingbird hit the car and the car hit the hummingbird. Compare the force on both the hummingbird and the car's windshield (the hummingbird was unharmed).

• The forces are equal and opposite.

• The force on the windshield is greater.

• The force on the hummingbird is greater.

• The force of the hummingbird is less than that of the windshield.

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An empty truck and a fully loaded truck are next to each other at a traffic light. When the light turns green, the lighter truck increases speed more quickly. Which of these best explains this situation?

• Newton's first law

• Newton's third law

• Newton's second law

• Conservation of momentum

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