Motion and forces
Changing motion
Work and energy
Simple machines
Miscellaneous
100
What is a PUSH or PULL on an object?
Force
100
When two forces are equal and opposite, they are called this.
What are balanced forces?
100
This type of energy moving through wires in your home.
What is electrical energy?
100
A machine with only a few parts is called this.
What is a simple machine?
100
The energy of a moving object.
What is kinetic energy?
200
If these boys are pulling with the same amount of force. What will happen?
The boy in blue will win.
They will not move at all.
The boy in red will win.
Both will fall down.
They will not move at all.
200
This is a change in speed or direction.
What is acceleration?
200
This is the ability to do work.
What is energy?
200
The force you apply to a machine is called.....
effort force.
200
The force is measured in this unit.
What is newtons?
300
The force that acts directly against the direction of motion.
What is friction?
300
This is the tendency of an object to stay at rest or stay in motion.
What is inertia?
300
At the very top of a hill, a roller coaster has the most of this type of energy?
Potential energy
300
A lever is a bar that rotates around a pivot called the.....
What is the fulcrum?
300
A force that causes an object to change its motion.
What is unbalanced force?
400
It describes the object's speed and direction of motion.
What is velocity?
400
True or False: The size of a force affects an objects acceleration?
True: The stronger the force, the faster the object will accelerate.
400
Scientist believe that energy cannot be created or destroyed, it can only change form. This theory is called....
What is law of conservation of energy?
400
When two or more simple machines are combined they form......
What are compound machines?
400
If earth suddenly had no gravity for 5 seconds,what would happen tp people and objects?
Everything would float upward because there would be no force pulling objects towards earth.
500
If you double the force on an object but keep the mass same, what happens to acceleration?
The acceleration increases because more force causes a greater change in motion.
500
What forces oppose the motion of a rolling soccer ball?
or
What causes a soccer ball's speed to decrease after it is kicked?
Friction and air resistance
500
If a battery-powered toy stops working,where did the energy go?
It was transformed into motion,heat,sound, and other forms.
500
Name the 6 types of simple machines
Inclined plane, wheel and axle, pulley, screw, wedge, lever
500
Name the 6 forms of energy
chemical energy
electrical energy
light energy
mechanical energy
thermal energy
nuclear energy