Physics - Newton's Laws
Scenario: Box on Frictionless Surface
A 5kg box is pushed across a frictionless surface with a constant force of 20N for 3 seconds. The box starts from rest. You need to analyze the motion and forces acting on the box during and after the push. Consider Newton's laws of motion, kinematics equations, and the principles of dynamics to evaluate each statement.
Which of the following statements are TRUE about this scenario?
Instructions: Select ALL statements that are correct. There are multiple correct answers. You will receive partial credit based on how many correct options you identify.
A. The box experiences an acceleration of 4 m/s²
B. The box will continue moving at constant velocity after the force is removed
C. The net force on the box during the push is 20N
D. The box's kinetic energy remains constant during the push
E. After 3 seconds, the box will be moving at 12 m/s
F. The box experiences a friction force opposing its motion

Scoring Method: Proportional Partial Credit

Correct Answers: A, C, E (3 out of 6 options)
Scoring: +1 for each correct selection, -0.5 for each incorrect selection (minimum 0)
Example: If you select A, C, E (all correct) = 100%. If you select A, C, D (2 correct, 1 wrong) = 67%