About your SI Leader
My Major
Biology
gravity
-9.8 m/s2
Sin equation
opposite / hypotenuse
work is zero when..
the force and displacement are 90 degrees apart
A soccer ball is kicked such that leaves the ground at a velocity 33 m/s at an angle 27 above the horizontal. What is the speed of the ball at maximum height?
14.98 m/s
Semesters I have left before I graduate
speed at max height
0 m/s
force
f=ma
torque is negative when traveling in this direction
clockwise
You are on a seesaw and your friend is sitting 1.6 m away from the pivot. Your friend wants to balance you by sitting on the other side of the seesaw. What distance from the pivot should you sit? You weigh 178 N and your friends’ weight is 675 N.
6.07 m
My Cats Name
Willow
True or False: Object mass does not matter for projectile motion
true
total energy
(1/2)mv2 + mgh
momentum is conserved for what types of collisions
all... elastic, inelastic and perfectly inelastic
pi = pf
A person pulls a crate with a force of 36 N, 29 degrees above the horizontal, over a distance of 4.2 m at a constant speed of 5.1 m/s. What is the work done on the object by the person?
132.2 J
Number of Siblings I have
1
have magnitude and direction (force, velocity, momentum)
vector
angular acceleration
w/t
velocity is at max where when a spring is pulled and let go
equilibrium
Two carts collide and bounce off of each other. Cart A is 3.0 kg and cart B is 5.0 kg. Before the collision, art A is moving to the right at 1.0 m/s and cart B is moving to the left at 2.0 m/s. After the collision, cart A is moving to the left at 1.0 m/s. What is the velocity for cart B after the collision?
0.8 m/s to the left
Least favorite thing to teach in Physics
Torque
type of collision that conserves momentum and energy
elastic collision
angular momentum
L=Iw
newtons second law
f=ma
A massive, frictionless cylindrical pulley (a disk) is hanging in the middle of the room. It has a mass of 8.7 kg and a radius of 0.3 m. The pulley is originally at rest. You grab a massless, no stretchable rope wrapped multiple times around the pulley, and pull with a constant force of 9.7 N in line with the rope. You pull the rope 5.0 m down, starting with no slack in the rope.
16.67 rad