1. The earth exerts a force of 2900 N on an orbiting communications satellite that is 40 mi above the Earth. What is the magnitude of the force the satellite will exert on the earth?
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- 9. A 770 kg car, with a 95 kg driver, is driving up a shallow hill of angle 0=5° directly into a strong headwind. The headwind exerts a force 200 N on the car. The coefficient of rolling friction for the car on the road is 0.025. What force must the car's engine produce so that it travels at a constant velocity of 10 m/s.2. Two boxes are connected to each other by a string as shown in the figure. The 10-N box slides without friction on the horizontal table surface. The pulley is ideal and the string has negligible mass. What is true about the tension T in the string? 10N A) T= 10 N B) T= 20 N C) T= 30 N D) T 30 N 30 N Why?60. An 8.0-kilogram block and a 2.0-kilogram block rest on a horizontal frictionless surface. When horizontal force F is applied to the 8.0-kilogram block, it accelerates at 5.0 meters per second east. If the same force was applied to the 2.0-kilogram block, the magnitude of the block's acceleration would be (1) 1.3 m/s2 (2) 2.5 m/s2 (3) 10. m/s2 (4) 20. m/s SHOW WORK, CIRCLE ANSWER, WRITE NEAT
- 5. A ball is thrown with an initial velocity of 8.5 m/s at an angle of 30.0⁰ from the horizontal. How long the ball is in flight? (assume g = 9.81 m/s²) 6. The planet A has a mass of 1.972-1024 kg and the planet B has a mass of 5.348-1024 kg. What is the distance between the planet A and planet B if the force of gravity between them is 2.111-1022 N?. (assume G = 6.670-10-¹¹ Nm²/kg²) 177010. A 260-g ball is tied to a string and it is being swung faster and faster in a nearly horizontal circle. When the speed reaches 16.5 m/s the tension reaches a value of 60.0 N, the string breaks. What is the radius of the circle? cm9