Vocab- Chapter 3
The rate at which an object's velocity changes.
What is acceleration
A push or a pull.
What is a force?
If a runner accelerates from 2 m/s to 3 m/s in 4 seconds, this is the average acceleration.
What is 0.25 m/s2?
A rocket has a mass of 2.8 x 106 kg. This is the minimum force needed for it to lift off the ground and accelerate upward.
What is 2.7 x 107 N?
What is m/s2?
The acceleration can be determined from a velocity-time graph by finding this.
What is slope?
The vector sum of two or more forces acting on an object .
What is net force?
A ball rolls past a mark on an incline at 0.40m/s. If the ball has an average acceleration of 0.20 m/s2, this is the velocity 3.0 seconds after it passes the mark.
What is 1.0 m/s?
An object has a mass of 120,000 kg and an acceleration of 3.1 x 10-4 m/s2. This is the force needed to accelerate the object.
What is 37 N?
The value of free fall acceleration near Earth's surface.
What is 9.80 m/s2?
Motion of an object when gravity is the only significant force.
What is free fall?
What is a contact force?
A car accelerates from 10.0 m/s to 15.0 m/s in 3.0 seconds. This is the distance that the car travels.
What is 38 m?
An object can be accelerated at 4.4 m/s2 by a net force of 970 N. This is the mass of the object.
What is 220 kg?
A feather does not fall in the same way as a pebble due to this.
What is air resistance?
The symbol that is used to represent free fall acceleration.
What is g?
A force exerted by an segment of a rope or string on an adjoining segment is.
What is tension?
A race car accelerates at 4.5 m/s2 from rest. This is the car's velocity after it has traveled 35.0 m.
What is 18 m/s?
A 35 kg object has a net force of 270 N applied to it. This is the accleration of the object.
What is 7.7 m/s2?
"The acceleration of an object is directly proportional to the net force on it and inversely proportional to its mass."
What is Newton's 2nd Law?
The change in velocity at an instant of time.
What is instantaneous acceleration?
A force exerted by a fluid on an object moving through the fluid.
What is drag force?
What is 29.4 m/s?
A sky diver with a mass of 75.0 kg jumps out of an airplane. This is the drag force at terminal velocity.
What is 735 N?
"The two forces in an interaction pair act on different objects and are equal in magnitude and opposite in direction."
What is Newton's 3rd Law?