A brand new ton of laws
Which law of motion explains why objects stay still unless acted on by a force?
DOUBLE BONUS (400 points): What was Galileo's proof for objects in motion will stay in motion forever unless acted upon?
What is Newton's First Law of Motion.
A ball rolling in a U-shaped track will attain the same height without friction, so if you lower one side of the track, opening it up, the ball will go forever since it cannot reach the height it started with.
A force is a push or a _____.
What is a pull.
What default unit is weight measured in?
What is Newtons.
What is the formula for work?
BONUS: What is the formula for distance given work and force?
What is work = force x distance
D = W / F
What are three examples of simple machines?
What are
Lever
Pulley
Inclined plane
Wheel and axle
Screw
Wedge
What word means resistance to changes in motion?
What is inertia.
10 N right and 4 N left. What is the net force?
What default unit is mass measured in?
What is kilograms.
What are the units of measure for work, distance, and force?
What are Joules, meters, and newtons.
What is the "cost" or "sacrifice" for reducing the input force needed to apply a greater output force? Eg, the input force needed to apply 50N on the output is only 5N.
What is the cost of distance that the output force can be applied.
Which law says force equals mass times acceleration?
What is Newton's Second Law.
Can an object accelerate if the net force is zero?
BONUS: Can an object slow down if it is in equilibrium?
What is no, it cannot.
No, an object in equilibrium cannot slow down, ie decelerate.
What is the formula for weight?
What is mass x gravity.
What does distance times force divided by time equal?
What is power.
Do simple machines reduce the work needed to produce some output force?
What is no, that would break physics.
What happens to acceleration if the force applied increases but mass stays the same?
What is acceleration increases.
Can an object slow down if the net force acting on it is 0N?
What is the formula for universal gravitation?
What is the force applied if the work done equals 50j and the distance traveled equals 2 meters?
What is 25N.
What is the mechanical advantage of a machine that applies an output force of 99N with 33N of input?
What is 1:3 or 1/3
A ball is kicked. The foot pushing the ball is the action force. What is the reaction force?
What is the ball kicking the foot.
What is the tension in one cable holding a 3000kg suspension bridge if all the cables hold an equal amount of weight and there are 6 cables? (round the force of gravity to 10N per Kg.)
What is 3000 x 10 / 6 = 5000 N
What is the gravitational force between two people whose centers are 40m apart? One person's mass is 40kg and the other person is 80kg. (Do not calculate G)
BONUS: What is the answer with G included in the calculation?
What is G(2N).
G(40 x 80 / 402) = G(2N)
6.67 x 10-11 (2) = 0.0000000001334N (9 zeros)
What is the power of an olympic lifter who raises a 500kg weight up 2m in 4 seconds?
BONUS: How much work does he do if he lifts the same weight twice as fast?
What is 250 Watts.
500 x 2 / 4 = 250
Work = 1000j. Speed matters not.
Which gear ratio is best for riding a bicycle up a steep hill? 1:2, 3:10, 5:1, or 4:4?
BONUS: Arrange the ratios from lowest to highest. (Low gear to high gear.)
What is 3:10.
3:10, 1:2, 4:4, 5:1