Show:
Work
Energy
Simple Machines 1
Simple Machines 2
Math
100
An object moving in the same direction as the force is called ________________
What is Work
100
Suppose you are jumping on a trampoline, at the top of your jump which of these is true? 1) The mechanical energy is zero 2) The potential energy is at a maximum 3) The kinetic energy and potential energy are equal 4) The potential energy is zero
2) The potential energy is at a maximum
100
When using a Pulley, the effort in N required to lift an object is reduced, but what is the tradeoff? The rope will have to be pulled a greater ___________.
Distance
100
A ramp is an example of which simple machine?
Inclined plane
100
A force of 30 N moves an object 5m. The amount of work is ______?
150 J
200
When work is being done and something is moving, this is also known as a type of _____________
What is Energy
200
When you stretch a rubber band, you give it what kind of energy? 1) Electrical energy 2) Gravitational potential energy 3) Elastic potential energy 4) Kinetic energy
3)
200
When using a Inclined Plane, less force is required to move an object, but you will have to move it a greater _________________.
Distance
200
A large rock and a long, thick board could be used to construct which simple machine? A) Screw B) Pulley C) Fulcrum D) Lever
D
200
If you exert 20 N of force on a screwdriver and it exerts 40 N on a paint can lid, what is the screwdriver’s mechanical advantage?
2 MA
300
What two factors are required for work to be done?
What is Force and Movement
300
Which of the following is designed to convert energy into mechanical work? 1) Electrical fan 2) Kerosene heater 3) Flashlight 4) Baking oven
Electrical fan
300
Another name for an Inclined Plane is a _________
Ramp
300
What is the best definition of a machine? 1) A machine is a time saving device that uses motors and gears. 2) A machine changes the amount of input force 3) A machine makes work easier by changing force, distance or direction 4) A machine can be either simple or compound
3) A machine makes work easier by changing force, distance or direction
300
What is the ideal mechanical advantage of a 2 fixed, 2 movable pulley?
4 MA
400
What activity describes work being done on an object? 1)Kicking a soccer ball 2) Lifting a bag of groceries 3)Holding up an umbrella 4) Pressing a stamp onto an envelope
Kicking a soccer ball
400
Potential energy + kinetic energy =
Mechanical energy
400
Which of the following causes machines not to be 100% efficient? 1) Friction 2) Input force 3) Output force 4) Power
Friction
400
Which simple machines make up a wheelbarrow?
wheel-axle and lever
400
Mr. Gore carries a 1000 g bag down the hall for 100 m. How much work is done?
No work
500
Becky is out with her friends. Their car breaks down and Becky and her friends find themselves getting a workout. They apply a total force of 1080 N to push the car 218 m to the nearest fuel station. Determine the work done on the car.
235,440 Joules
500
Unless the gasoline tank of a car is refilled, the car will stop moving when it runs out of gas. What happened to the energy that was stored in the gasoline? 1) It was eventually destroyed 2) It was converted into matter 3) It was converted into motion and heat 4) It was converted into solar energy
3
500
In order to lift a heavy object with a lever, where is the best place to put the load? A) Closer to the fulcrum B) Further from the fulcrum
A.
500
Which of the following is an example of a second class lever? Paddle Seesaw Shovel Wheelbarrow
Wheelbarrow
500
What is the potential energy of an object that has a mass of of 150g and a height of 400 m?
588000 J