A student is investigating mass and acceleration. The student applies the same force of 40 N force to two boxes that have the same size and shape. Box 1 experiences an acceleration of 10 m/s^2 and box 2 experiences an acceleration of 5m/s^2.
The student claims that box 1 must have a smaller mass than box 2. Which argument best supports the student's claim?(1 point)
Responses
Heavier objects need less force than lighter objects to accelerate at the same rate.
Heavier objects need less force than lighter objects to accelerate at the same rate.
Heavier objects need greater force than lighter objects to accelerate at the same rate.
Heavier objects need greater force than lighter objects to accelerate at the same rate.
Lighter objects need greater force than heavier objects to start moving but will accelerate at the same rate.
Lighter objects need greater force than heavier objects to start moving but will accelerate at the same rate.
Lighter objects need less force than heavier objects to start moving but will accelerate at the same rate.
The argument that best supports the student's claim is that lighter objects need less force than heavier objects to accelerate at the same rate.
The correct argument that supports the student's claim is: Lighter objects need less force than heavier objects to accelerate at the same rate.
The correct argument that supports the student's claim is: "Lighter objects need less force than heavier objects to start moving but will accelerate at the same rate."
To understand why this argument is correct, we need to recall Newton's second law of motion, which states that the force acting on an object is equal to the mass of the object multiplied by the acceleration it experiences (F = ma).
In this case, both boxes are subjected to the same force of 40 N. However, box 1 has a higher acceleration of 10 m/s^2, while box 2 has a lower acceleration of 5 m/s^2. According to Newton's second law, if the force is constant, the only way the acceleration can be different is if the mass of the objects is different.
Therefore, since the force applied is the same, if one box (box 1) experiences a higher acceleration, it means it has a smaller mass compared to the other box (box 2). Thus, the argument that "Lighter objects need less force than heavier objects to start moving but will accelerate at the same rate" supports the student's claim.
Two forces act on an object. One force has a magnitude of 30N directed west, and the other force has a magnitude of 12 N directed east. What is the net force on the object?(1 point)
Responses
42 N east
42 N east
18N west
18N west
42N west
42N west
18N east
18N east
To find the net force on the object, we need to add the two forces together. Since the force directed west has a magnitude of 30N and the force directed east has a magnitude of 12N, we can subtract the east force from the west force.
30N - 12N = 18N
Therefore, the net force on the object is 18N west.