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Science Bowl Question

📅 NSB 2021🎓 HS🔄 Round 2#️⃣ Q12❓ TOSS-UP📝 Multiple Choice

Only two forces are acting on a large rigid body: one is 5 newtons upwards, and one is 5 newtons downwards. However, the object is not at equilibrium. Which of the following could be the reason why?

W) External forces are acting on the object
X) The net force is non-zero
Y) The net torque is non-zero
Z) The object had a non-zero initial speed
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