When an object's distance from another object is changing it is...
What is in motion
100
As a slope of a line increases on a distance vs. time graph, what happens to the speed?
What is the speed increases
100
The law of universal gravitation states that any two objects in the universe, without exception...
What is attract each other
100
What simple machine is used to move a flag to the top of a flagpole?
What is a pulley
100
When you rub your hands together on a cold day, you use friction to convert mechanical energy into......
What is thermal energy
200
The basic SI unit of length is
What is the meter
200
The force that one surface exerts on another when the two rub against each other is called...
What is friction
200
According to Newton's Third Law of Motion, when a hammer strikes and exerts force on a nail, the nail....
What is exerts an equal force back on the hammer
200
A machine can make work easier by...
What is changing the direction of force needed to accomplish a task.
200
What is gravitational potential energy?
What is potential energy that depends on height
300
The rate at which velocity changes is called
What is acceleration
300
Which is an example of rolling friction:
a. your shoes on a sidewalk as you walk
b. bike tires on the road as you ride
c. a boat on the water as it sails
What is B
300
In order for work to be done on an object the object must...
What is must move some distance as a result of force
300
A simple machine that might be thought of as an incline plane wrapped around a cylinder is a ...
What is a screw
300
You can calculate an object's gravitational potential energy by.....
What is weight X height
400
A place or object used for comparison to determine if something is in motion is called...
What is a reference point
400
Which of the following is an example of increasing friction intentionally...
a.waxing skis
b. adding grease to gears on a bike
c. throwing sand on an icy driveway
What is C
400
Define inertia....
What is the tendency of an object to resist any change in motion
400
How can a ramp be considered a machine?
What is it multiplies distance
400
At which point on a pendulum iss the greatest kinetic energy?
What is at the bottom of its swing
500
If you know a car traveled a total distance of 300 kilometers in a total time of 3 hours, you can finds its...
What is average speed
500
What does the head of an arrow indicate?
What is the direction of the force
500
What is the formula to calculate work?
What is Work= Force x Distance
500
Without friction there would be less output work than input work. (true or false)
What is false (greater output work)
500
How do you find an object's mechanical energy?
What is by adding Potential Energy+ Kinetic Energy