Force & Motion
What unit do scientist use to measure force?
Newtons
Any object that is launched or thrown through the air is known as a what?
a projectile
What is a collision?
When any two objects come into contact with one another.
When a golfer is swinging their club, when in their swing would they have the most kinetic energy?
The bottom of the swing right before they hit the golf ball
How could you increase the drag of a rocket?
increase the surface area, blunt nose cone and body, rougher body
Which law of motion states that F=ma?
Newton's 2nd Law
What is the one variable that is universal when solving projectile motion problems?
Time
Momentum in a collision is never created or destroyed, only what?
Transfered
The sum of kinetic and potential energy in a system is known as what?
Mechanical energy
What is the main purpose of the fins on a rocket?
produce lift and stabilize the rocket during flight
The speed you read on a speedometer is the...what?
Instantaneous Speed
If you wanted to decrease the amount of centripetal force being applied to an object moving in a circle, what could you do?
Increase the radius of the circular motion
What does a completely inelastic collision mean?
The two objects stick together after the collision
The transfer of energy from one object to another is known as what?
Heat
What are the 4 aerodynamic forces?
Lift, thrust, weight/gravity, drag
An objects ability to resist the change in motion, is known as what?
Inertia
The highest point of a projectile is known as what?
Apogee
If a 180kg lion is traveling 2.5m/s when it collides with a 450kg elephant walking at 1m/s, which one would have more momentum?
They would both have the same amount of momentum...... p=mv
What are the 3 ways energy can be transferred?
Conduction, Convection, Radiation
During the recovery phase of a rocket launch, which forces are the greatest?
Gravity and drag
If a person has a mass of 70kg, what is their weight?
686 N
A period in circular motion is equal to what?
The amount of time it takes to travel once around the circle
How is force related to time during an impact collision?
The greater the time= less force experienced
more force experiences = less impact time
Name the 3 types of potential energy?
Gravitational, Elastic, Chemical
Bernoulli's Principle states that?
The fast the air moves over an object the less pressure is created.