Answer and work out the following questions.
15. Define Kinetic Energy. 6. A race car accelerates uniformly from 18.5 m/s to 46.1 m/s in 2.47 seconds. Determine the 16. What is the equation for kinetic energy. acceleration of the car and the distance traveled. 17. What are the units of Kinetic energy? 7. What are Newton's 3 Laws and provide an 18. What is the Kinetic Energy of a 250 kg object example of each. that is moving with a speed of 35 m/s? 8. A 7.0 kg ball falls from rest at 11.4 m towards the 19. What is the Kinetic Energy of a 1350 kg object Earth in 4.5s. What is the magnitude of the that is moving with a speed of 94 m/s? acceleration due to gravity on Earth? 20. Define Potential Energy. 9. A 6.8 kg bullet is shot with a speed of 44 m/s before it strikes a 1.95 kg clay block that is 21. What is the equation for potential energy? stationary on a horizontal frictionless surface and remains inside of it. What is the speed of the block after the bullet becomes embedded in it? 22. What are the units of potential energy? 10. Determine the momentum of a 10-kg professional fullback running across the line at 9.2 23. An object of mass 55 kg is placed on a hill top m/s. of height 120m. What is the potential energy possessed by the object? 11. According to the Guinness Book of World Records, the fastest recorded baseball pitch was 24. A pendulum with string length 6.2m is dropped delivered by Nolan Ryan in 1974. The pitch was from rest. If the mass at the end of the pendulum is clocked at 66.2 m/s. Determine the impulse 7.13kg, what is its initial potential energy? required to give a 0.54-kg baseball such a momentum. 25. What is centripetal force? G* m1*m2 d2 26. What is the equation for centripetal force? where G represents the universal gravitation constant 27. A 755 kg race car makes one lap around a (G =6.67 x 10-11 N.m2/ kg2) track of radius 56. m in 11.0 s 12. Given the gravitational force equation, what a. What is the car's average speed? happens to the force of attraction when: b. What is the car's angular speed? a. Distance is doubled C. What is the car's centripetal acceleration? b. Masses are doubled d. What is the centripetal force acting on the c. Distance is reduced by half? car and which force provides it? 13. Two spherical objects have masses of 265 kg and 120 kg. Their centers are separated by a distance of 125 km. Find the gravitational attraction between them. 14. Two spherical objects have masses of 2.5 x 10^3 kg and 6 x 10^7 kg. Their centers are separated by a distance of 520 m. Find the gravitational attraction between them
