Definitions
Def: a push or pull
force
What is the formula for speed?
s = d/t, distance divided by time
What are the 2 types of speed?
average speed and instantaneous speed
A car starts from a stoplight and is traveling with a velocity of 10 m/sec east in 20 seconds. What is the acceleration of the car?
0.5 m/s2
Def: change in position relative to a reference point
motion
What is the formula for momentum?
p = mv, mass x velocity
What is the other type of acceleration?
Centripetal acceleration
What is the speed of a jet plane that travels 528 meters in 4 seconds?
132 m/s
Def: the rate at which velocity changes over time
acceleration
What is the formula for acceleration?
(final velocity - initial velocity)/time
What are the 4 types of forces?
Gravity, electromagnetic force, strong nuclear force, and weak nuclear force
Calculate the momentum of a 1200kg car with a velocity of 25m/s.
30,000 kg*m/s
Def: the distance traveled divided by the time interval during which the motion occurred
speed
What is the formula for Newton second law of motion?
F = ma, mass x acceleration
What are the types of concepts of projectile motion?
vertical and horizontal concept
An object with a mass of 1500 g (grams) accelerates 10.0 m/s2 when an unknown force is applied to it. What is the amount of force?
15,000 N
Def: the force that two surfaces exert on each other when they rub against each other
friction
What is the formula for the law of universal gravitation?
F = G(m1m2)/d2)
What are the 5 types of friction?
static, kinetic, rolling, sliding, and fluid friction
25N ----> + 20N ----> = _______
What is the net force and direction?
5N ----> right