W5 Concepts
For work to be done on an object, a ______ must be applied. The object must ______ in response to the force applied. Furthermore, the applied force must be __________ to the displacement.
Lol idk
What is energy/change in time? Define it.
I have the _______!!!! He-man!
While playing the greatest sport on earth, curling, a stone slides across the ice. It slides approximately 1300cm before slowing down to a speed of 1.03m/s. What was the initial speed if the force of kinetic friction exerted on the stone is 0.49N in magnitude? Use conservation of energy.
dont hate me curling is actually fun
A penguin (mass = 14kg) stands on a floating piece of ice (mass = 32kg). The penguin waddles to the edge, preparing to dive, at a velocity of 0.6m/s. What is the resulting velocity (magnitude and direction) of the ice relative to the water?
Which component of force can contribute to force?
a. all components of force
b. forces perpendicular to the direction of the object's motion
c. forces that act in the opposite direction of the object's motion
d. forces that work in the same direction of the object's motion
e. only downward components (i.e. gravity)
hahaha
hehehhe
A marble is released from rest at the top edge of a bowl (hemi-sphere). When it reaches the bottom of the bowl, its speed is 7000mm/s. Use conservation of energy to find the radius of the bowl in centimeteres. neglect friction :(
how is the marble going so fast
McQueen and Bobby Swift collide completely inelastically. After the collision they have a velocity of 111km/s at 23* south of west. McQueen (2.5e4 kg) was initially driving with a velocity of 145km/s at 35* south of west. What was the initial velocity of Swift (3.4e4kg)? (Bonus: why was Swift driving in the wrong direction)?
**vrrrrrrooom**
What does "conservation of energy" mean, and what are the components of it (i.e. Ep and Ek)?
Follow up: what do the components each depend on?
you thought didn't you
Momentum is _______ when ______ are balanced. Why?
fill in the blank and explain?? rude
Rihanna pulls the music industry of mass 5.22kg up a ramp to her stage, inclined at 15.22º to the horizontal. The vertical height of the hill is 20m. Neglecting friction, what is the work the icon must do on the music industry to pull it at a constant velocity up the ramp?
worgworgworgworgworg lemmeseeem dirddirddirddirddird
The magnitude of the momentum of Lightning McQueen is 1.2e4 kg*m/s. A force of magnitude 4.11e3 N increases the cars momentum for a time of 2.6 seconds. What is the magnitude of his new momentum?
ka-chow
What is the sum of Ek + Ep?
a. higher if Ek is greater than Ep
b. always equal
c. higher if Ep is greater than Ek
d. you can't sum forces lol
lol ya you can
What are the three ways objects can collide?
:))))
Consider the following scenario: a ball is rolling down a staircase-like path to the floor. Indicate the types of forces doing work on the ball, then indicate whether teh energy of the ball in conserved. Why?
nice one but i don't have the answer sorry
What happens to momentum when two objects collide? Why?
bing bong bing bong