# Science Terms-Ch. 5

The flashcards below were created by user ccoe on FreezingBlue Flashcards.

1. equals distance traveled divided by the time it takes to travel that distance

S=d/t
average speed
2. the speed of an object and the direction of motion; changes when speed changes
velocity
3. occurs when an object speeds up, slows down or changes direction
acceleration
4. a push or pull
force
5. a set of rules developed by Isaac Newton to explain how forces affect the motion of an object
Newton's laws of motion
6. a force between two surfaces in contact that resists the motion of the surfaces past each other.
friction
7. the tendency to resist a change in motion

--pushing the wheelchair in a straight line and then trying to change the the direction of motion (turn)
inertia
8. is done when an applied force causes an object to move in the direction of the force
---picking up a box
work
9. a device thta makes work easier with only one movement: include the wedge, screw, lever, wheel and axle, pulley and inclined plane

Ex. screwdriver
simple machine
10. a combination of simple machines

Ex. can opener
compound machine
11. the number of times the applied force is increased by a machine is called the ________
12. an object, like a wheel, that has a groove with a rope or cable running through it.

It changes the direction of the input force

pulley
13. a rod or plank that pivots about a fixed point.

The point is called the fulcrum

lever
14. a sloped surface, sometimes called a ramp.

It allows you to lift a heavy load by using less force over a greater distance

---Moving a couch from the ground into a trunk bed

inclined plane
 Author: ccoe ID: 121231 Card Set: Science Terms-Ch. 5 Updated: 2011-12-08T19:34:13Z Folders: Description: Science Terms Chapter 5 Show Answers: