Language: English

# Get these flashcards, study & pass exams. For free! Even on iPhone/Android!

## Science test Chapt. 7 review (25 Cards)

The result of a force applied to an object causing it to move.
work
a measure of how fast an object changes position
speed
the force moved by a machine when effort is applied
the steepness of a slope
the force applied to a machine
effort
the ability to do work
energy
slanted surface
inclined plane
the rate of change in velocity over a period of time
acceleration
a beam or bar that rotates around a fulcrum
lever
a device used to make work easier
simple machine
crowbar
lever
wheelbarrow
lever
seesaw
lever
gears
wheel and axle
ax
wedge
twist-off bottle cap
screw
ramp
inclined plane
knife
wedge
True/False: Joules are used to measure force.
False: Joules are used to measure work.
True/False: A fulcrum is the pivot point of a lever.
True
The combination of an object's speed and direction is its energy.
False: The combination of an object's speed and direction is its velocity.
True/False: Oars on a boat are examples of second-class levers.
False: Oars on a boat are examples of first-class levers
In a first-class lever, what is the relationship between the effort's distance to the fulcrum and the amount of effort force needed to move the load?
As the distance from the effort to the fulcrum decreases, the amount of effort needed increases.
If a third-class lever requires more effort, what advantage does it provide?
The advantage to using a third-class lever is that while the effort only moves a small distance, the load moves a greater distance.
An object needs to travel a set distance. In order to do more work, what must increase?
Mass or acceleration
Flashcard set info:
Author: Rebecca
Main topic: Science
Topic: Force and Work
School / Univ.: Freedom Baptist Schools
City: Hudsonville, MI
Published: 24.01.2010
Tags: Rebecca Thomas

Card tags:
All cards (25)
no tags