Physics
The unit for force
Newton
The unit for velocity
Meters per second
The difference between weight and mass
Mass is what makes up the object, weight is how gravity or acceleration acts on an objects mass.
What is the acceleration formula?
a=(Vf-Vi)/t
the acceleration due to gravity
9.8 m/s2
If an object is at rest, what is its velocity?
0 m/s
A hammer and a feather are dropped at the same time on the moon. They both reach the ground at the same time. Why?
There is no air, so all objects will fall at the same rate
What are the forces acting on a ball thrown into the air
Air resistance and gravity
This is the formula to calculate Speed
What is distance รท time?
What is the definition of static equilibrium
An object at rest
What is "g"?
Acceleration due to gravity in formulas
The three symbols for the speed formula.
"V," "t," and "d"?
What is the formula for distance with acceleration in the formula
d=Vot + (1/2)(a)(t)^2
The difference between Scalar and vector.
In acceleration formula, what does Vo stand for?
Initial Velocity
A gun is fired directly into the sky, what would the velocity of the bullet be when it reaches it's maximum height?
0 m/s
If a tennis ball was let go off the top of NGC and hit the ground in 3.2 seconds, How fast will it be traveling when it hits the ground?
31.4 m/s
What is the acceleration of an object that changes its speed of 45m/s to 75m/s in 5 seconds?
6 m/s^2
What does the second law of newton indicate?
The force of an object is equal to the mass times the acceleration of the object, or, the acceleration of an object is equal to the force divided by the mass.
Name two thing that isaac newton discovered other than his motion laws.
-Optics
-Integral Calculus
-Differential Calculus
-Contributions to acoustic and dinamics
The distance a car traveled if it drove at 40 m/s for 30 minutes (Convert to km)
1minute = 60 secs
1km = 1000m
72 km?
D = v*t = 40 m/s * 1800 s
D= 72,000 m = 72 km
Otis has a mass of 45 kg; what is the scale reading when Otis is traveling upward at a constant velocity of 2 m/s on an elevator?
(45 )(9.81 ) = 441.45 N
Does your weight increase or decrease when traveling upward on an elevator?
Increases
Tyler runs the basketball court 5 times (from one side back to the other 5 times). Ending in his original starting place. What is Tyler's displacement at the end of his run?
0 meters. He ended where he started
Name the three laws of motion stated by Isaac Newton
*First law: Every object in rest will remain that way until an external force acts upon it, and every object in movement will stay that way until an external force acts upon it (intertia law).
*Second Law: The Force of an object is equal to the mass of the object times the acceleration.
*Third law: for every action there's an equal reaction in magnitude and in the oposite direction