Physics Quiz: Newtons Laws, Forces, FBDs

Quiz
•
Physics
•
11th Grade
•
Hard
Standards-aligned
Sophie Ouellette
FREE Resource
37 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
In a collision between a huge SUV and a small hybrid car, the SUV exerts a larger force on the hybrid than the hybrid exerts on the SUV.
True
False
Answer explanation
According to Newton's third law, for every action, there is an equal and opposite reaction. Therefore, the force exerted by the SUV on the hybrid is equal to the force exerted by the hybrid on the SUV, making the statement false.
2.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
A satellite is in orbit around the earth. Which one feels the greater force?
the satellite because the earth is so much more massive
the earth because the satellite has so little mass
Earth and the satellite feel exactly the same force.
It depends on the distance of the satellite from Earth.
Answer explanation
According to Newton's third law, the Earth and the satellite exert equal and opposite forces on each other. Therefore, both the Earth and the satellite feel exactly the same force, despite their mass difference.
Tags
NGSS.HS-PS2-1
NGSS.HS-PS2-4
3.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
You push on box G that is next to box H, causing both boxes to slide along the floor, as shown in the figure. The reaction force to your push is
the push of box G on box H.
the push of box H on box G.
the push of box G against you.
the upward force of the floor on box G.
Answer explanation
The correct reaction force to your push is the push of box G against you, as per Newton's third law. For every action, there is an equal and opposite reaction, meaning your push on box G results in a push back from it.
Tags
NGSS.HS-PS2-1
4.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Two blocks, A and B, are being pulled to the right along a horizontal surface by a horizontal 100-N pull, as shown in the figure. Both of them are moving together at a constant velocity of 2.0 m/s to the right, and both weigh the same. Which of the choices below shows a correct free-body diagram of the horizontal forces acting on the upper block, A?
A → 100N
100N ← A → 100N
A ← 100N 100N
A → 50N
A (No horizontal forces act on A.)
Answer explanation
Since blocks A and B are moving at a constant velocity, the net horizontal force on block A is zero. Therefore, no horizontal forces act on A, making the correct choice: A (No horizontal forces act on A).
Tags
NGSS.HS-PS2-1
5.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Which of the choices below shows a correct free-body diagram of the horizontal forces acting on the lower block, B?
B → 100N
100N ← B → 100N
B ← 100N 100N
B → 50N
B (No horizontal forces act on B.)
Answer explanation
The correct choice, '100N ← B → 100N', accurately represents the horizontal forces acting on block B, indicating that there are equal forces acting in opposite directions on the block. We know this is true because despite having a force applied to it, the box is not accelerating.
Tags
NGSS.HS-PS2-1
6.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
You are in a train traveling on a horizontal track and notice that a piece of luggage starts to slide directly toward the front of the train. From this observation, you can conclude that this train is
speeding up.
slowing down.
changing direction.
speeding up and changing direction.
slowing down and changing direction.
Answer explanation
The luggage sliding toward the front indicates that the train is decelerating. In a train that is slowing down, objects inside will move forward relative to the train's frame of reference.
Tags
NGSS.HS-PS2-1
7.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
A net force of 125 N is applied to a certain object. As a result, the object accelerates with an acceleration of 24.0 m/s². The mass of the object is
3000 kg.
144 kg.
0.200 kg.
5.21 kg.
Answer explanation
Using Newton's second law, F = ma, we can find the mass. Rearranging gives m = F/a. Substituting the values, m = 125 N / 24.0 m/s² = 5.21 kg. Thus, the mass of the object is 5.21 kg.
Tags
NGSS.HS-PS2-1
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