A bottle of juice is sealed under partial vacuum, with a lid on which a red dot or "button" is painted. Around the button the following phrase is printed: "Button pops up when seal is broken."
Explain why the button remains pushed in when the seal is intact.
Because there is a partial vacuum on the inside until the seal is broken. With atmospheric pressure on the outside, there is a net force pushing down on the cap.
correct.
How much force is needed to accelerate a 50-kg rider and her 250-kg motorcycle at 5 m/s2?
1 answer
pulling 6.0N over a distance of 12.5m how much force is used