Newton's Laws
This vector sum of all forces acting on a body determines its acceleration.
What is the net force?
The pull exerted on an object by a planet, calculated by multiplying the object's mass by the local acceleration due to gravity.
What is weight (or gravitational force)?
A simplified diagram showing an object and all the external forces acting upon it, represented as vectors.
What is a free-body diagram?
This fundamental law of motion is summarized by the equation "F net equals m times a".
What is Newton's second law?
This force is always perpendicular to the surface pressing against an object.
What is the normal force?
For every action force, there is an equal and opposite force of this type.
What is a reaction force?
The property of an object that resists changes in its motion.
What is mass?
The pulling force transmitted through a rope, cable, or cord when it is taut.
What is tension?
In a system where a 3.3 kg block on a frictionless table is connected by a cord over a pulley to a 2.1 kg hanging block, the tension in the cord is approximately this value.
What is 13 Newtons?
In SI units, a 1 N force is defined as the force required to give a 1 kg mass this exact acceleration.
What is 1 meter per second squared?
When an elevator accelerates upward, the reading on a scale inside is __________ compared to the person's weight when at rest.
What is greater?
On a frictionless inclined plane, this component of the gravitational force causes the object to accelerate down the ramp.
What is the parallel component (or "m g sine theta")?
A 0.20 kg puck on frictionless ice has a net force of 2.0 N applied to it. Its acceleration has this magnitude.
What is 10 meters per second squared?
An object has a weight of 49 N on a planet where the acceleration due to gravity is 9.8 meters per second squared. Its mass is this.
What is 5.0 kilograms?
In a multi-car roller coaster, the acceleration reaches its greatest value just before the last car goes over the edge because this many cars are already on the downward slope.
What is nine?