It's the law!
This law of Newton's states that forces always come in pairs that are equal in magnitude and opposite in direction.
What is Newton's 3rd Law?
An 4 kg object experiencing a 20 N net force has this acceleration.
What is 5 m/s2?
The slope of the line on a velocity vs. time graph.
What is the acceleration?
Even on top of Mount Everest, the acceleration due to gravity on Earth would be approximately equal to this value.
What is 9.8 m/s2?
Kinetic energy is conserved in this type of collision.
What is perfectly elastic?
This law allows us to set the potential energy at the top of a hill to the kinetic energy at the bottom if there are no net external forces.
What is the law of conservation of (mechanical) energy?
An object speeds up from rest with an acceleration of 2 m/s2 in 3 seconds. How far did it travel?
What is 9 meters?
The area under the curve of a velocity vs. time graph.
What is the displacement?
This is the unit for gravitational field strength.
What is Newtons per kilogram (N/kg)?
For any angular quantity, multiply it by this to find its translational equivalent.
What is the radius?
This law relates the amount of stretch or compression to the spring force that results from it.
What is Hooke's Law?
This is the frequency of a pendulum if it swings back and forth 20 times in 10 seconds.
What is 2 Hertz?
The slope of the line on a horizontal displacement vs. time graph of a projectile.
What is initial velocity in the x-direction?
With no air resistance, the maximum range for a projectile occurs at this angle of launch.
What is 45 degrees?
Single objects cannot have this type of energy, only systems can.
What is potential energy?
This law relates the force of gravity directly to two objects' masses and inversely to the square of their distance apart.
What is the Law of Universal Gravitation?
A object travels at constant speed due to centripetal force, F. If the tangential speed is doubled, this is the new centripetal force the object is experiencing.
What is 4F?
The area under the curve of a Force vs. displacment graph.
What is work?
Discovered by Henry Cavendish in 1798, the Universal Gravitational Constant (G) has this value.
What is 6.67 x 10-11 N*m2/kg2?
When designing an experiment, this is the best way to reduce experimental error.
What is repeat trials multiple times at several different levels of the independent variable?
Newton's First Law is often called the law of this physical quantity.
What is inertia?
A 10 N*m net torque is applied for 10 seconds to a disk with rotational inertia 1/2MR2 and a hoop with rotational inertia MR2. This object has a greater final angular momentum.
What is neither one (they have the same)?
Of the trigonometric functions, this one has a value of 1 at zero degrees and a value of 0 at 90 degrees.
What is cosine?
Astronauts take a simple pendulum to the Moon (1/6 of Earth's gravity). The period on the Moon is this many times longer than the period is on Earth.
What is sqrt(6)?
Two ice skaters standing together push off each other on a smooth, icy surface. Because the forces applied are internal, this aspect of the two-skater system does not accelerate.
What is the center of mass?