A student is investigating mass and acceleration. The student applies the same force to two boxes, as shown in the table.
Box Force Applied to box Acceleration (meters/second^2)
(newtons)
1 20 5
2 20 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
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.
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.
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.
Lighter objects need less force than heavier objects to start moving but will accelerate at the same rate.
The best 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.
The argument that best 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 this argument, we need to review the relationship between force, mass, and acceleration. According to Newton's second law of motion, the acceleration of an object is directly proportional to the net force applied to it and inversely proportional to its mass. The equation that represents this relationship is F = m * a, where F is the net force, m is the mass of the object, and a is the acceleration.
Looking at the data provided in the table, we can see that the force applied to both boxes is the same (20 N), but the accelerations are different (5 m/s^2 for box 1 and 2 m/s^2 for box 2).
Based on Newton's second law, we know that if the force is constant, a smaller mass will result in a larger acceleration, as the mass is inversely proportional to the acceleration. So, if both boxes experience the same force, but box 1 has a larger acceleration than box 2, then it means that box 1 must have a smaller mass than box 2.
Therefore, the best argument to support the student's claim is: "Lighter objects need less force than heavier objects to start moving but will accelerate at the same rate."
The correct answer is: "Heavier objects need greater force than lighter objects to accelerate at the same rate."
are you sure??
I apologize for the confusion. You are correct, the best argument that supports the student's claim is actually: "Heavier objects need greater force than lighter objects to accelerate at the same rate." Thank you for catching that mistake.
14N pulling left ----BOX---- 8N pulling right
Which change in force would stop this box from moving?
(1 point)
Responses
subtracting 8 N of force pulling to the left
subtracting 8 N of force pulling to the left
adding 6 N of force pulling to the right
adding 6 N of force pulling to the right
adding 6 N of force pulling to the left
adding 6 N of force pulling to the left
subtracting 8 N of force pulling to the right
To stop the box from moving, we need to have a net force of zero acting on the box. The net force is the vector sum of all the forces acting on the box.
In this case, we have a 14 N force pulling to the left and an 8 N force pulling to the right. To make the net force zero, we need to subtract the force that is pulling to the right, which is 8 N.
Therefore, the change in force that would stop the box from moving is: subtracting 8 N of force pulling to the right.