Plan and carry out investigations into forces, including measuring force with a newton meter, investigating Hooke's Law, and collecting and interpreting motion data to test Newton's laws
A first look
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Question 1 of 3
A student wants to show that an electric field exists between a charged plastic rod and a small piece of paper, even though the two objects never touch. Which part of the student’s experimental design provides the strongest evidence that a force is acting at a distance?
Question 2 of 3
A 5‑kg block is pulled across a frictionless horizontal surface and accelerates at 2 m/s². What is the magnitude of the net force acting on the block?
Question 3 of 3
Two forces act on the box as shown by the arrows. What is the net (overall) force on the box?
A box with a force of 8 units pulling left and a force of 7 units pulling right.
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