Newton's first law of motion
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Explain physical observations using Newton's first law and inertia
Explain using Newton's Law or inertia:
- True or false: a vase sitting still on a desk has no horizontal forces acting on it. Explain your answer.
- Why do you press against your seatbelt when you are in a car that stops suddenly?
- A shopping cart is pushed at a constant velocity of 1.5 m/s with a force of 40 N. What is the net force acting on the cart?