Vocab Test
This is the word for a push or a pull on an object.
What is a force?
This is the formula for average speed.
What is speed = distance/time?
These are the two ways machines can make work easier.
What are changing the size and/or direction of a force?
This is how an inclined plane makes work easier.
What is changing the direction of force to reduce the effort force (spreading the force out over a longer time)?
Newton's First Law tells us that this kind of force is needed to change an object's state of motion.
What is an unbalanced force?
This is the name for all of the forces on an object added together.
What is net force?
This is the mechanical advantage of a machine that requires 70N of effort force to do work with a resistance force of 350N.
What is 5?
This is the mechanical advantage without accounting for friction.
What is ideal mechanical advantage?
This is how a lever changes force to make work easier.
This is an example of where we can see Newton's Third Law in action.
[Answers will vary]
This is the word for the tendency of an object to resist a change in its state of motion.
What is inertia?
This is the amount of work done when 90N of force moves an object 5 meters.
What is 450 Joules?
This is the mechanical advantage that accounts for friction.
What is actual mechanical advantage?
This is how a pulley makes work easier.
What is changing the direction of force?
This is what Pascal's Principle tells us will happen when pressure is applied to one part of a fluid.
What is the pressure will spread evenly throughout the fluid in all directions?
This is the name for the measure of the amount of useful work done by a machine compared to the work done to make the machine operate.
What is efficiency?
This is the rate of acceleration of gravity (without accounting for air resistance).
What is 9.8 m/sec.2?
This is the name for the kind of machine that combines two or more simple machines into one machine.
What is a compound machine?
This simple machine is an inclined plane wrapped around a cylinder.
What is a screw?
What is the force of gravity on the displaced fluid?
This is the name for the distance between two adjacent threads on a screw.
What is pitch?
This is the acceleration of a cart that starts off moving at a velocity of 15 m/sec. and slows down to a velocity of 3 m/sec. after a period of 6 seconds.
What is -2 m/sec.2
A wheelbarrow is a combination of these two simple machines.
What are a lever and a wheel and axle?
What is MA = diameter of wheel/diameter of axle?
This is what Bernoulli's principle tells us will happen to the pressure in a fluid as the velocity increases.
What is decrease?