Constant motion
What is constant motion?
Covering the same distance every time interval
What is accelerated motion?
Motion where a changing amount of distance is covered every second or direction is changed.
What are the 5 forces we use most in this class?
Gravity, applied, friction, normal, tension
What is the equation for constant motion?
V=d/t
What is the equation for acceleration?
A = change in V/ t or V = Vo + at
What motion is possible when there are a) balanced forces? B) unbalanced forces?
A) at rest or cm B) am
How far does a toy car travel in 3.2 minutes if it constant speed is 1.2 m/s?
230.4 m
What does the PT graph of accelerated motion look like?
A parabola
What does force have to do with torque?
Force time the radius or moment arm is equal to torque
How could one find the distance traveled by a constant motion toy car if one had a VT graph of the car?
Find the area below the curve.
What is the displacement of a rocket that fired straight up at 25 m/ s after 5 s? ( assume the burn is not part of this time, it already occurred ).
0 m
What force is responsible for accelerating a 100 kg mass 2.4 m/s2 if 50 N of friction acts in the opposite direction on the mass?
290 N
Which of the following cars has the lowest constant speed?
A) car a covers 120 m in _19.4s
B covers 280 in 38.4 s
C covers 360 in 62.1 s
Car c ( 5.8 m/s)
An electron has an acceleration of 3.2 m/s. At a certain time it has a velocity of 9.6 m/ s. A) what is its v 2.5 s earlier? B) what is its v 2.5 s later?
1.6 18
What is the coefficient of friction on a sled that has a mass of 250 kg and takes a force 500 N of applied force to move at cm?
0.2