When the net force equals O N, forces are said to be ________________.
What is the SI unit for force?
What type of force causes an object to begin moving?
What is the net force when Ted is pulling a rope to the right with a force of 525 N and Bill is pulling the rope to the left with a force of 500 N?
Using the previous question’s example answer the follow questions: *The forces were working together or opposite forces? *The forces were equal or not equal? *The forces did or did not balance each other out? *There was motion or no motion?
List the three types of kinetic friction.
A force that opposes motion between two surfaces in contact is called ________________.
A force applied to an object but does not cause the object to move is called ______________.
List one example of when friction is helpful and one example of when friction is harmful.
List one example of a way to increase friction and one example of a way to decrease friction.
1. balanced 2. Newtons 3. an unbalanced force N right 5. *opposite forces *not equal *did not balance *was motion 6. sliding, rolling, and fluid 7. friction 8. static friction 9. helpful=walking, stopping a car harmful=friction in car engines wearing down parts. 10. increase=make surface rougher, apply more force decrease=make surface smoother, sliding-rolling, lubricants