Force
Force is measured in this unit.
What is newtons (N)?
The slope of a distance/time graph tells you...
Speed
If the object does not _______, no work is done.
Move a distance!
Name the two things you need to know to figure out an object's speed.
What are distance and time?
Use this simple machine to cut, split, or push apart.
What is a wedge?
This force keeps the planets revolving around the sun.
What is gravity?
Draw a distance/time graph where the object is at rest.
(Your graph should have a straight horizontal line on it)
What is the equation for work?
w=f*d
Velocity is speed with...
Direction
List the six simple machines.
Lever, Pulley, Wheel & Axle, Wedge, Screw, & Inclined plane
If two people are applying the same amount of force to the same object in opposite directions, the force is ____________
What is balanced?
A curved line on a distance/time graph tells you...
The object is accelerating
A 1000 newton person that travels 10 meters in 60 seconds generates how much power?
166 watts
What is it called when there is a change in speed or velocity?
What is acceleration?
You pull down on a rope passing over a grooved wheel and it causes a bucket to be lifted up. What simple machine did you use?
Pulley
The amount of force used to to complete 40 Joules of work over 4 meters.
10 N
The slope of a speed/time graph tells you...
Acceleration
How much work does it take to lift a 20 newton book 1.5 meters off the floor?
30 joules
A plane flies 1000 meters in 4 seconds. What is its speed?
250 m/s
Two of the simple machines in scissors
Screw, wedge, lever
30 N
Draw a speed/time graph where the object is not accelerating.
(Your graph should have a straight horizontal line on it)
Julie and her twin sister Julia both weigh 300 newtons. They race up a 100 meter staircase. Julie takes 60 seconds to get to the top. Julia takes 120 seconds to get to the top. Who did the most work?
Trick question- they both did the same total amount of work, but their power was different.
You're a construction worker. You take the bus to work, a crane lifts you up onto a tall building, and you move equipment around using a wheelbarrow. You just used a bunch of ___________ machines.
Compound (or complex) machines