Balanced & Unbalanced Forces
When forces are equal in strength and opposite in direction, they are called this type of forces.
Balanced forces
The motion of a pendulum is an example of this type of pattern
Cycles (Swing cycles) (Cyclical patterns)
The unit used to measure force.
Newton
In an experiment, this is the factor that scientists intentionally change.
The independent variable.
The force that pulls objects toward Earth.
Gravity
This happens to an object's motion when unbalanced forces act upon it.
It moves.
The number of complete back-and-forth movements a pendulum makes in a certain time period is called this.
The frequency or number of swings.
Swing frequency.
Swing cycles.
When a billiard ball strikes another ball, this happens to the energy of motion.
It is transferred. (Transferred energy)
The purpose of collecting data in a science experiment.
To find patterns and make future predictions.
One way to increase the force of a balloon rocket.
Blow more air into the balloon in increase the pressure/force.
A spider hanging motionless from its web demonstrates this concept about forces.
Balanced forces (equal strength, opposite direction producing no motion)
As a pendulum's string gets longer, the number of swings it makes in a set time will do this (increase, decrease, or stay the same).
Decrease
To change the direction of a hockey puck moving left, you need to apply force in this direction.
Right. (The opposite direction)
When testing how string length affects pendulum swings, the number of swings would be this type of variable (independent, dependent, or controlled).
A DEPENDENT variable.
The motion pattern observed when jumping on a pogo stick.
Cycles of repeated up-and-down motion.
When a cabinet is pushed against a wall and doesn't move, this describes the forces.
They are balanced.
When a rubber ball bounces repeatedly, each bounce follows this type of predictable pattern (hint: height of bounces over time)
The height decreases as the bounces continue.
This force always works against the motion of objects and slows them down.
Friction
This is what scientists do with experimental data to make predictions about future events.
They analyze patterns. (Average the trial data)
What happens to friction when a ramp becomes steeper (increase, decrease, or stay the same).
It decreases.
The extra acceleration overcomes the force of friction.
Newton's First Law of Motion states that objects at rest stay at rest unless acted upon by this.
An outside (external) force.
Chloe jumps 2 x per second. If she jumps for 25 seconds, she would complete this many jumps. (Confirm numeric detail before
50 jumps.
When a balloon rocket moves forward, it demonstrates this principle of action and reaction.
Newton's 3rd Law. (For every action, there is an equal and opposite reaction.)
When investigating forces on a ramp, the steepness of the ramp would be this type of variable.
Independent variable.
(It's the one YOU change to test the outcomes.)
The relationship between the mass of a person on a swing and how quickly their swinging motion stops.
It has no effect. The increased inertia equals the increased force of gravity.