I
Cause:
a=f/m
Resistance
Inertia
Ideal conditions are:
9.8 m/s2
wt=?
r
Air resistance
F=?
ma
Friction is represented with a capital F, true or false
False
Motion is possible when v=0, true or false
False
Motion is possible when a=0, true or false
True
Give it example of two angles that will hit the ground at different times, but land in the same spot
Ex: 60+30
89+1
45+45
75+15 etc.
An object that travels through and was placed in motion by a force and continues emotion through its own inertia
Projectile
A body continues in its state of rest or uniform motion unless changed by another force
Law two
Acceleration and unbalanced forces
Law three
Involves two unbalanced forces
(equal opposite reaction)
Compare to jumpers, 100 pounds versus 200 pounds same parachutes, same Altitude, and both parachutes are open to the arealtitude, and both parachutes are open at the same time R will be equal for both, which one will land first
The one that has more terminal velocity
Compare a baseball and a tennis ball dropped from a skyscraper
The
What are the horizontal components
Mass = inertia =resistance
What are the vertical components
Weight equals gravity equals force
What is the unit for force
Newton
kg m/sec2
If the forces are equal, if the masses vary what else will vary?
Acceleration
How much force do you apply to a three kg cart that rolls at an acceleration of 2m/sec2
6 Newton
What is the acceleration if you apply a 6 Newton force to a 6 kg cart
1 m/sec2
What is the weight in newtons on a 10 kg mass at the surface of the earth
98 Newton
An unbalanced force of 150 Newtons is applied to a boat which is accelerated at 0.50 m/sec2. What is the mass of the boat
300 kg
A moving cart is pushed from behind with a force of 10 Newton’s , The retarding forces of friction in our resistance equal 10 Newton . No other horizontal forces act upon the cart. If it has a massive 2 kg, what is its acceleration?
0
An unbalanced force of 115 N is applied to a boat which is accelerated at .50 m/sec2 . What’s the Mass of the boat?
300 kg