Against the Laws
Gravity turns
Use the force
Equations
Answer me this
100
Which has more inertia, a 20kg ball going 10m/s, or a 2 kg ball going 100m/s
The 20kg Ball. Mass measures inertia, speed doesn't matter
100
What is the weight of a 3kg object on Earth?
3*9.8 = 29.4N
100
What direction does the normal force point when an object is on an inclined surface. (a ramp)
Diagonally upward, perpendicular to the surface of the ramp.
100
What is the equation for weight?
Fw=mg (massxgravity)
100
Naruto
200
Which student's claim is correct and which Law supports it?
Student A: "When you hit them, heavier objects will always push back with a greater force than light objects."
Student B: "When you hit them, heavier objects and lighter objects will all always push back with an equal and opposite force, regardless of their mass."
Student B, Netwon's 3rd Law
200
What direction do both the centripetal force and centipedal acceleration always point?
Towards the center of the circle
200
Draw a free body diagram of a cardboard box being pushed across a rough floor at a constant speed.
A box with four force arrows pointing up, down, left and right. The up and down forces are the same size, up is Normal force and down is Gravity. The left and right arrows are the same size. One is an applied force of push, the other is friction.
200
What does "μ" stand for in the friction equations?
The coefficient of friction
200
Which famous actor is commonly referred to as older than sliced bread?
Betty White
300
A bug is hovering in the air when it gets hit by the windshield of a car. Which object experienced a greater force, the bug or the windshield?
They experience the same force, due to Newton's 3rd law
300
How would the force of gravity between two planets change if the mass of each planet doubled AND, the distance between them doubled.
2*2/22 = 1. The changes in mass cancel out with the increase in distance. The force will stay the same.
300
Two students made claims, Which is of the following is correct about friction. (Select all that apply):
A) the coefficient of kinetic friction is always the same as the coefficient of static friction
B) the coefficient of kinetic friction is always smaller than the coefficient of static friction
C) The coefficient of kinetic friction can be bigger or smaller than static friction, it depends on the shape of the object, its mass, and the roughness of the surfaces.
Student B is correct.
300
If an object weighs 460 N, what is its mass on Earth?
Fw=mg
460 = m(9.8)
m= 460/9.8 = 46.94 kg
300
How many dragon balls are there in Dragon Ball Z?
Seven
400
A 10kg bowling ball hits a 1kg baseball with a force of 20N. What is the acceleration of each ball?
Bowling ball = 2m/s2 , baseball = 20m/s2
400
What is the centripetal force on a 2kg mass if it has a tangential velocity of 3m/s and is going in a 4m radius circle?
(2)(3)2/4 = 9/2 = 4.5N
400
A student applies a 50N force to a 30kg block that is at rest on a rough surface. The coefficient of static friction between the block and the floor is 0.2. Will the box move?
Ff=uFN FN = Fg =mg =(30)(9.8) =294N
Ff=(0.2)(294) = 58.8 which is greater than 50N, so won't break static friction and box won't move
400
Fill in the missing variable:
Vf = _ + at
Vi
400
How much wood would a woodchuck chuck if a woodchuck could chuck wood?
A wood chuck would chuck what a woodchuck could chuck, if a wood chuck could chuck wood.
500
Draw a position vs time graph of an object that has a non-zero net force.
A line curving quadratically either concave up or concave down.
500
A child is spinning around on a merry go round. How would the centripetal force on the child change if the speed of the merry go round were to double?
speed is squared and directly proportional, so force will go up by x4
500
If a student uses 980N to raise a barbell and the barbell weighs 110kg. Is the student using enough force to lift the barbell?
Fw = mg, Fw = 110x9.8, Fw= 1078N
No, the student is not using enough force to lift the barbell successfully.
500
What does "G" stand for in the gravitational force equation?
The gravitational constant (6.67x10^-11)
500
What did Bella and Edward win in their biology class for correctly identifying the phases of mitosis?
A Golden Onion