Question

1. Two boxes are connected by a light cord, which runs over a below. The coefficient of friction is 0.54. mi = 5 kg and m2 4 kg. a) Find the acceleration of the system. b) Find the tension in the cord (2 pts.) pulley. See fig. m2 2. The 3.5 kg mass on the incline frictionless plane shown below moves upwards under the action of a force of 18.08N parallel to the surface. The force acts as a tension in the cord. The angle between the horizontal and the incline plane is 35 degree. How large is the acceleration? (1 pt.) 3.50 kg 35,0° 3. A confused flying bird rounds a horizontal circular path at a constant speed. In 24s it completes 6 turns. The radius of the path is observed to be r 8 m. a) Find the bird's speed. b) Find the magnitude of the centripetal acceleration c) What missing information is required in order to estimate the bird's mass? (3 pts.) 4. How large must the coefficient of static friction be between the tires and the road, if a car rounds a level curve of radius 85 m at a speed of 23.5 m/s? (1 pt.)

question 2-4 please

Answer 1

T N E N f N T-F ma T: 2. x 9. 8 2C.46 2 3.6 S S2 Ts 18.08 N mqsin3 ms 3:S T- mg &in35° = ma 18. S- 3.5 x9.2 o's = 3 S a SS.61 - 80.91 42 3 S