016 (part 1 of 2) 10.0 points Objects with masses of 228 kg and 243 kg are separated by 0.349 m. A 25 kg mass is placed midway between them. 243 kg 228 kg 25 kg 0.349 m Find the magnitude of the net gravitational force exerted by the two larger masses on the 25 kg mass. The value of the universal gravi- tational constant is 6.672 10-11 N. m/kg. Answer in units of N. 017 (part 2 of 2) 10.0 points Leaving the distance between the 228 kg and the 243 kg masses fixed, at what distance from the 243 kg mass (other than infinitely remote ones) does the 25 kg mass experience a net 018 10.0 points You weigh 630 N. What would you weigh if the Earth were three times as massive as it is and its radius were five times its present value? Answer in units of N. 019 (part 1 of 2) 10.0 points On the way to the moon, the Apollo astro- nauts reach a point where the Moon's gravi- tational pull is stronger than that of Earth's. Find the distance of this point from the center of the Earth. The masses of the Earth and the Moon are 5.98 1024 kg and 7.36 1022 kg, respectively, and the distance from the Earth to the Moon is 3.84 108 m. Answer in units of m. 020 (part 2 of 2) 10.0 points What would the acceleration of the astro- naut be due to the Earth's gravity at this point if the moon was not there? The value of the universal gravitational constant is 6.672 10-11 N. m/kg. Answer in units of m/s. 015 10.0 points A highway curves to the left with radius of curvature of 48 m and is banked at 22 so that cars can take this curve at higher speeds. Consider a car of mass 1956 kg whose tires have a static friction coefficient 0.67 against the pavement. top view R = 48 m 0.67 22 rear view How fast can the car take this curve without skidding to the outside of the curve? The acceleration of gravity is 9.8 m/s. Answer in units of m/s.