1. The egg is accelerating downward due to gravity after being dropped.
2. The object is moving at a constant velocity, so net force is zero; gravity is balanced by air resistance.
3. The puck moves right with constant velocity, so no net force; forces are balanced.
4. The car turns left at constant speed, so centripetal force acts leftward toward the center of the turn.
5. The airplane flies straight and level at constant velocity, so lift balances weight and thrust balances drag.
6. The ball is thrown upward; gravity acts downward while air resistance also opposes motion (downward during ascent).
7. The rope is pulled at constant speed, so tension equals friction or opposing force; net force is zero.
8. The box slides down an incline with increasing speed, so component of gravity down the slope exceeds friction.
9. The rope is pulled with increasing speed, so tension exceeds friction or opposing force; net force in direction of motion.
10. The rope is pulled while speeding up, so tension exceeds opposing force; net force in direction of acceleration.
11. The box is pushed at constant speed, so applied force equals friction; net force is zero.
12. The skater coasts on ice after pushing off; negligible friction, so no net force; continues at constant velocity.
Parent Tip: Review the logic above to help your child master the concept of force diagrams worksheet.
