* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download Calculating Force - Spring Branch ISD
Survey
Document related concepts
Relativistic mechanics wikipedia , lookup
Equations of motion wikipedia , lookup
Center of mass wikipedia , lookup
Coriolis force wikipedia , lookup
Nuclear force wikipedia , lookup
Newton's theorem of revolving orbits wikipedia , lookup
Jerk (physics) wikipedia , lookup
Rigid body dynamics wikipedia , lookup
Centrifugal force wikipedia , lookup
Fictitious force wikipedia , lookup
Modified Newtonian dynamics wikipedia , lookup
Classical central-force problem wikipedia , lookup
Transcript
Name:_________________________________________ Date:______________ Science 8th Grade Calculating Force Sir Isaac Newton expressed the relationship between force, mass, and acceleration in his second law. Newton’s contribution to science was so great that the unit for force, the Newton (N), was named after him. A Newton is defined as the force needed to produce an acceleration of 1 m/s2 on a 1 kg object. Therefore, 1 N = 1 kg x 1 m/s2. The equation for Newton’s second law is given below. Your answers should be to the tenths place and boxed. Force = mass x acceleration 1. or F = ma A soccer ball accelerates at a rate of 22 m/s2 forward when kicked by a player. The soccer ball has a mass of 0.5 kg. How much force was applied to the ball to produce this acceleration? m= a= 2. Calculate the force necessary to accelerate the following vehicles at the rate of acceleration shown in the illustrations. a. m = 115 kg a = 6 m/s2 Force =__________________________________ b. m = 3950 kg a = 25 m/s2 Force =__________________________________ c. m = 14,056 kg a = 112 m/s2 Force =__________________________________ 3. How much force is needed to move a 0.1 kg snowball at a rate of 12 m/s2 upward? 4. A 0.02 N push accelerates a table-tennis ball along a table at 8 m/s2 north. What is the mass of the ball? 5. At lift-off, an astronaut on the space shuttle experiences an acceleration of approximately 35 m/s2 upward. What force does an 80 kg astronaut experience during this acceleration? 6. If a 2 kg bird is pushed by the wind with a force of 2 N, how fast does the bird accelerate? 7. A car has a mass of 700 kg and is accelerating at 2 m/s2. Calculate the unbalanced force that is causing this acceleration. 8. A truck has a mass of 2000 kg and the engine has a driving force of 3000 N. Calculate the acceleration that caused the unbalanced force. 9. How much force is needed to accelerate a 70 kg rider and her 200 kg motorcycle at 4 m/s2? 10. A 63 kg skater pushes off from a wall with a force of 300 N. What is the skater’s acceleration? 11. With what force will a car hit a street sign if the car has a mass of 2,800 kg and it is accelerating at a rate of 2 m/s2? 12. A 12 kg bowling ball would require what force to accelerate it down a lane at a rate of 3 m/s2? 13. What is the mass of a falling rock if it hits the ground with a force of 147 N? 14. What is the acceleration of a baseball if it has a mass of 0.50 kg and hits the catcher’s glove with a force of 30 N? 15. What is the mass of a car if it is accelerating at a rate of 4 m/s2 and hits a parked truck with a force of 12,000 N?