Question

Problems 1. FORCE QUESTIONS Answer these three conceptual questions with words, pictures, and if needed equations/math ideas. a)Consider a passenger plane, such as a Boeing 777. Draw a conceptually correct free-body diagram for such a plane when it is flying in a straight line at constant speed and when it is taking off and it is accelerating upwards and forwards. b) We observe that all dropped objects accelerate at a constant rate of about 9.8 m/s near the surface of the earth. Does this mean they all experience the same force of gravity? Why or why not? c) An interesting, and common physics demo is done thus: A significant mass, say 3 kg, is suspended from a very strong support via a thin string (kite string, or similar) and a second piece of string (same stuff) is tied to the bottom. A broom handle, or other stick is tied to bottom string to pro- tect the performer's hand) and then pulled downward either very quickly or slowly. If it is pulled quickly the bottom string breaks. If it is pulled slowly the top string breaks. Explain. Hint: Draw a picture.

Answer 1

V - Constant w it ( if then Feift = W is taking off Flift >W .. is taking forward ↑ Flift to Fforward it it swoud W so it will be leka

F = na mess (m) . for different object is different so . Force due to grauity will be different, 0 F . if we pull quickly . Tension in bottom string will be highes due to impulsive force so it will break If we pully slowly upper string will have . Higher tension due to mass also so it will break .