13. Clarice moves an 85 kg set of weights by applying a force of 150 N. What is the coefficient of friction? 14. A car has a coefficient of friction between the ground and its tires of 0.85. What is the mass of the car if it takes 9820 N of force to make it slide along the ground? 15. A small crate with a mass of 17.5kg is acted upon with a net force of 11.2 Newton's to the right. What is the acceleration of the crate? 16. What is the weight of a boulder that has a mass of 1556 kg? 17. If a 75 kg astronaut moves from Earth to the Moon, does he lose weight on the moon? (moon's gravity is 1.6 m/s2) 18. If the weight is 1,000 N, the mass is _____________ kilograms. 19. If the weight is 458.46 N, the mass is ____________ kilograms 20. If you are standing on the surface of the Earth, which way does the weight vector point? 21. What is the mass of an object on Planet X that has a Force of weight of 4532.8 N and the gravity is 13.3m/s2 22. Find the net force and the acceleration for each of the following images