Kinematics
Projectiles
Forces
Work, Power, Energy, Momentum
1
What makes a variable a vector?
Direction and magnitude
1
If a ball is launched from a catapult, what force(s) are acting on the object in the air. Assume there is no air resistance.
Force of gravity
1
What force changes if you change the surface?
The force of friction
1
What does the work-energy theorem state?
W = change in energy
1
Draw a situation where the displacement is zero.
Start point = End point
1
Increasing the mass of an object that is dropped, makes the time in the air increase, decrease or stay the same?
Stay the same
1
What force is completely independent of mass?
Spring force
1
What are the units for Impulse?
Kg m/s
1
What is the definition equation for acceleration?
a = v / t
1
Why is the horizontal velocity of a projectile constant?
There is no net force in the horizontal direction.
1
What variable could you use a force vs extension graph to find?
The spring constant
1
What does the conservation of momentum state?
pi = pf
1
What type of motion is this graph showing?
Speeding up in the positive direction
1
If an object is launched from the ground at a 30 degree angle, if/when will the object be at rest?
Never, it will always have a horizontal velocity.
1
What is a system with a pulley and two masses freely hanging connected by a rope called?
Atwood machine
1
Can an object moving at 14 m/s on a 10 m hill, go up a 12 m hill?
Yes
2
What is the motion of this graph?
Object is speeding up in the negative direction.
2
What is the angle from the horizontal will produce the greatest height?
What angle from the vertical will produce the greatest range?
90 degrees
45 degrees
2
What is the equation for the acceleration of an Atwood machine?
(m1-m2)/ (m1+m2) * g
2
What makes something an inelastic collision?
Give an example
Total KE is not conserved
Sticky collision, or explosion