The unit of work is the

The unit of power is the

Force multiplied by distance equals

Work is done on an object when the object moves in the _ direction in which the force is applied.

If you pull at an angle instead of in the direction in which the object moves, _ of your force does work.

You do more work when you move an object _

The more _ you use to move an object, the more work you do.

If you lift a box from the floor to a height of 1 m and then carry the box for 10 m, you do work only when you _ the box.

Power is the _ at which work is done.

Divide output work by input work and multiply by 100 to find a machine's ____________________.

Machines are devices that allow you to do ________________ in an easier way.

The force exerted by a machine is the ______________________.

The force exerted on an object, multiplied by the distance the object moves is equal to ___________________ which is expressed in joules.

The force you exert when you use a machine is the

A machine's mechanical advantage is the output force __________________ by the input force

If the output force is greater than the input force, the mechanical advantage of the machine is __________________________________ one.

If the machine increases distance, the output force is ____________________________ the input force.

In other words: If we put in a large force over a small distance how does that machine use our force to increase distance?

If the machine changes direction but not the amount of input force, the machine's mechanical advantage _______________________________.

An ideal machine has no friction

The ideal mechanical advantage of an inclined plane is the length of the plane divided by its

When you use a wedge you move

Which of these wedges has a greater mechanical advantage?

In a first class lever the fulcrum is between the input force and the output force.

A knife is an example of a

A flat, sloped surface is called a(n)

A device that is thick at one end and thin at the other is a

The threads of a screw act like a

The fixed point that a lever pivots around is the

Is this an example of a first, second, or third class lever?

Is this an example of a first, second or third class lever?

Is this an example of a first, second, or third class lever

Which 2 classifications of levers can have a mechanical advantage greater than 1?

One of the simple machines that turns is the wheel and _

A single pulley changes the _ of a force.

A system of fixed and _ pulleys is called a block and tackle.

A screwdriver and a doorknob are examples of a(n) _

In a compound machine, the _ of one simple machine becomes the input force of another simple machine.

Calculate the mechanical advantage of a compound machine that is made with the following 3 parts:

1 fixed pulley with a mechanical advantage of 1

1 block and tackle pulley with a mechanical advantage of 3

1 wheel and axle with a mechanical advantage of 8

Choose the correct formula to find the mechanical advantage of a wheel and axle.

To find the mechanical advantage of a pulley, count the sections of rope that sections of rope that support the object.

A bicycle is a compound machine because it is composed of more than one simple machine.

Which part of the wheel and axle will be the part with the smaller radius?

Which of the following use pulleys to decrease their effort?

Which of the following has a wheel and axle?

What are the 6 simple machines we discussed in class?