Show:
Motion
Forces
Newton's Laws
Simple Machines
Random
100
What type of motion does a pendulum have?
Periodic motion
100
__________ is the force that acts against moving objects. (example two objects rubbing together)
friction
100
What is Who discovered the Laws of Motions?
Isaac Newton
100
The object lifted by a lever is called a ______________.
Load
100
____________________is a push or pull that acts on an object.
Force
200
What type of motion does the Earth have?
Steady or constant motion
200
__________ is the force between the mass on earth and the mass on other objects. It keeps a satellite in orbit around Earth.
Gravity
200
_______________ is the tendency of an object to resist a change in motion. (The reason we wear seatbelts)
Inertia
200
A _______________ makes it easier to cut, split, or fasten things.
Wedge
200
What is a machine with two or more simple machines called?
Complex Machine
300
_______________ describes the speed and the direction of an object's motion.
Velocity
300
Which of the following activities can be described as work: A) pushing a desk that doesn't move B) brushing your hair
B) brushing your hair
300
What Law of Motion states that for every action there is an equal and opposite reaction?
Newton's Third Law
300
The balance point of a lever is called the ______________.
Fulcrum
300
What term describes the amount of matter in an object?
Mass
400
A train is traveling 150 miles north in 3 hours. What is the velocity of the train?
50 miles per hour/north
400
True/False Electricity and magnetism can only pull objects.
False - They can both push or pull objects.
400
_______________ is the rate at which the velocity of an object changes over time.
Acceleration
400
What two simple machines make up a pair of scissors?
Lever and Wedge
400
What is the unit used to measure force?
Newtons
500
What is the formula for calculating average speed?
Average Speed = Distance __________ Time
500
The greater the net force actin g on an object, the greater the _______________ of the object.
Acceleration
500
What term describes the state in which the net force is 0?
Equilibrium
500
Name the four simple machines found on a bicycle.
Wheel ad Axle, Screw, Pulley, Levers
500
Machine A performs 64 joules of work in 8 seconds. Machine B performs the same amount of work in half the time. Which machine used more power?
Machine B