Increasing these two factors will increase frictional force.
What are "roughness" and "force applied?"
100
Velocity includes this but speed does not.
What is "a direction?"
100
In the absence of air resistance, which would fall first – a hammer or a feather?
What is "neither." The acceleration due to gravity is the same for both objects - 9.8 m/s/s
100
This property of matter keeps "objects at rest" and "moving objects moving" at the same speed and in the same direction.
What is "inertia?"
100
This amount of work in joules is used to lift a 10N box to a height of 0.5 meters.
What is "5 joules?"
200
Which of the following pairs of forces is balanced?
a). 16N north and 16N south
b). 16N north and 16N east
c). 16N north and 16N west
d). 16N north and 16N north
What is "a. 16N north and 16N south?"
200
Describe the slope on a distance-time graph of an object traveling at a constant speed.
What is a"positive slope" or a "slope that rises upward at the same rate."
200
Air resistance is this “type of force” because it opposes the motion of objects through air.
What is "friction?" (fluid)
200
Which object has the greatest inertia?
a). a 3g ping-pong ball
b). a 5 g marble
c). a 1kg rubber ball
d). a 10 kg bowling ball
What is "d). a 10 kg bowling ball?"
200
Which of the following is a simple machine?
a). a bicycle
b). a pair of scissors
c). a can opener
d). a doorknob
What is "(d). a doorknob?"
300
Two forces act on an object. One force has a strength of 10 N and is traveling toward the east. The other has a strength of 5 N and is traveling toward the west. The net force on the object is?
What is "5 N east?"
300
Sound travels at a speed of 330 m/s. If John hears a police siren 165 meters away, how long did it take the sound to reach his ear?
What is "30 seconds" t = d/s
t = 165 m/s / 330m/s
t = 2sec
300
The force of gravity between two objects depends on these two factors.
What is the "mass and the distance between the two objects?"
300
Suppose you know the acceleration of a shopping cart as it rolls down a supermarket aisle. You want to find the net force with which it is pushed. What other information do you need to know in order to find the force?
What is the "Mass" of the cart? F = m x a
300
Relative to the load, where must the fulcrum be placed to increase the mechanical advantage of a lever.
What is "closer to the load?"
400
An unbalanced force changes an object’s motion in one of these three ways.
What is "increase speed, decrease speed, or change direction?"
400
A flat line on a speed-time graph represents this type of motion.
What is "constant velocity?"
400
If Earth’s mass doubled, this would happen to your weight, but not your mass.
What is "double." Mass would stay the same.
400
This law explains how the shuttle’s thrusters push downward on the gases and the gases push upward on the shuttle, causing it to lift off.
What is "Law 3?" For every action, there is an equal and opposite reaction.
400
A machine makes work easier by changing these two things about the effort force.
What is " size of the effort" and "the distance through which it is applied?"
500
Suppose you doubled the force acting on an object. In what way could you change its mass to keep acceleration the same?
What is "double the mass?"
500
A boat leaves a dock and travels west reaching a speed of 6m/s after 3 seconds. What is its acceleration?
What is 2m/s/s? (final velocity - initial velocity / time?)"
500
A penny at rest is dropped from the top of a stairwell. What is the penny’s velocity after it has fallen for 2 seconds?
What is "19.6 m/s/s"
change in velcoity= g x t = 9.8m/s/s x 2 s
500
An object moving in a straight line with a constant speed has no unbalanced forces acting on it. How will the object’s motion change over time?
What is "the object's motion will not change?"
500
When using a block and tackle, what determines the number of times effort force is multiplied?
What is "the number of rope segments supporting the load."