Unit 3 Quiz 4

The amount of kinetic energy put into or added to an object (also known as the change in kinetic energy) is directly related to the __________ done on that object.

If an inclined plane has you moving an object up a 5 meter ramp simply to move it vertically 1 meter, you can expect the amount of force required to do this work is now around _________ what it was before using the ramp.

If a simple machine is able to apply 2.5 Newtons of force and cause an object to move 0.6 meters, how much work did it do?

A screw is basically a(n) ______________ wrapped around a cylinder.

In order to give you mechanical advantage you need to have _____________ pulley(s) with _______________.

Simple machines are used because they reduce the total amount of work needed for any given task.

Simple machines are used because they reduce the amount of force needed to accomplish a given task, even though they do not reduce the overall work.

Joules is the unit of work. If a 5 kilogram mass is lifted up 20 centimeters here on the surface of planet Earth, how many Joules of work were done (type in the number answer ONLY - do not include units or you will be marked wrong by this test program)!!!

A task is requiring a worker to put in 500 Joules of energy to complete. In this task he is exerting 250 Newtons over 2.0 meters of displacement. If the worker uses a machine that now increases the displacement of his force to 10.0 meters, how much force will he have to exert to get the same task done?

A steering wheel is an example of a(n)

A person is using a lever to try and lift a 200 kilogram mass. If she places the fulcrum 0.5 meters away from the 200 kilogram mass and 5 meters from where she will be exerting her force, how much force will she have to put into the machine in order to lift the mass?