Physics of Motion
The unit for velocity
Meters per second
What is the acceleration formula?
a=(Vf-Vi)/t
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
This is the formula to calculate Speed
What is distance ÷ time?
What is the definition of static equilibrium
An object at rest
What is "g"?
Acceleration due to gravity in formulas
31.4 m/s
What is the formula for solving the downward force problem in an elevator?
F = mg - ma
The difference between Speed and velocity
Speed refers to how fast an object is moving, only considering the magnitude of its motion, while velocity indicates both the speed and the direction of an object's movement
In acceleration formula, what does Vi stand for?
Initial Velocity
A 5 kg block is pulled on a frictionless horizontal plane at 5 m/s2. Find the tension in the string holding it in place.
5 * 9.8 + 5 * 5 = 74N
The three symbols for the speed formula.
What are "s," "t," and "d"?
If a force of 50 N is applied to a block of mass 10 kg and does not move, what is the coefficient of friction for the block and table?
(10 )(9.8) = 98N = 50/98 =.51u
Two masses, m1 = 2 kg and m2 = 3 kg, are connected by a light string over a frictionless pulley. Find the acceleration of the system.
((3 - 2) ÷ ( 2 + 3)) * 9.8 = 1.96
What is the formula used to solve tension on an inclined plane?
What is
T = m*g *sin(θ)
The distance a car traveled if it drove at 40 m/s for 30 minutes (Convert to km)
1minute = 60 secs
1km = 1000m
What is 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?
What is 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
Which type of friction is generally the strongest?
A) Rolling friction
B) Kinetic friction
C) Static friction
D) Fluid friction
C) Static friction