Work and Power
Mechanical Advantage
Simple Machines
Potential and Kinetic Energy
Random
100
This formula will calculate for work
What is work = force x distance
100
When calculating for mechanical advantage, which number goes on top of the fraction?
What is the bigger number
100
This simple machine can be best defined as a double inclined plane.
What is a wedge
100
This formula will calculate for potential energy due to gravity
What is PE = mass x gravity x height
100
Which requires more work; walking up stairs or running up stairs. Why?
Both are the same amount of work because w=f*d. the force and distance is the same in both scenarios. However, it does require more power to run (p=w/t)
200
This formula will calculate for power
What is power = work / time
200
Which would give you a greater mechanical advantage, 1 fixed pulley system or a 2 pulley system with one moving and one fixed?
What is a 2 pulley system with one moving and one fixed
200
This simple machine can be best defined as an inclined plane wrapped around a cylinder.
What is a screw
200
This formula will calculate for kinetic energy
KE = (1/2) Mass x Velocity2
200
When calculating for efficiency, which number goes on top of the fraction?
What is the little number
300
Calculate the amount of work done on a shopping cart if it is pushed a 10 meter distance with 10 Newtons of force.
What is 100 Joules
300
Which ratchet would yield the greatest mechanical advantage and why?
What is the largest one because the force out put is greater than the others due to the longer handle.
300
This simple machine is a lever that increases both force and distance.
What is a 1st class lever
300
Name the three forms of potential energy
What is gravitational potential, elastic potential, and chemical potential
300
Be 50% efficient from the free throw line out of 10 shots for 300 points
🤣 🤣 🤣
400
Find the amount of power needed to do 100 J of work on a to lift a car in 2 seconds
What is 50 watts of power
400
A person pushes a 250 N box up an incline. If the person exerts a force of 75 N along the incline, what is the mechanical advantage of the incline? (mechanical advantage = output force / input force)
What is 3.33
400
This simple machine can be best defined as a lever connected to a shaft.
What is a wheel and axle
400
Caluclate the potential energy of a 1,500 kg truck at the top of a hill that is 37 m high
What is 543,900 J
400
Using a lever 200 joules of work is output. However the input of the work was 250 joules. Calculate the efficiency of the lever.
What is 80% efficeient
500
Find the amount of power needed to move a wheelbarrow 20 meters in 20 seconds if you are applying 10 newtons of force
10 watts of power
500
A person pushes a box up an inclined plane a distance of 8 meters in order to reach the entrance of a building 2.5 meters above the parking lot level. What was the mechanical advantage of the inclined plane? (Mechanical advantage = input distance / output distance)
What is 3.2
500
This type of machine is created when two or more simple machines are incorporated into one bigger machine.
What is a compound machine
500
Calculate the kinetic energy of a 1,700 kg car that is moving at a speed of 11.80 m/s.
118,354 Joules
500
A pulley system operates by allowing 850 J of work to be output with an input of 950 J of work. What is the efficiency?
What is 89% efficient