Definitions Part 1
Means "to move". A branch of mechanics concerned with the study of motion without consideration of the forces that caused the motion.
What is Kinematics?
The force that pulls objects toward the center of the Earth.
What is gravity?
Solve for the velocity for 0-10 seconds on Graph 1. You must include units in your final answer.
What is (5m - 0m) / 10 s = 0.5 ft/s?
Solve for the acceleration for 0-5 seconds on Graph 2. You must include units with your answer.
What is a = (5 ft/s - 0 ft/s) / (5 s) = 5 ft/s / 5 s = 1 ft/s2?
If the slope of a position versus time graph is positive, copy down ALL of the TRUE statements:
The velocity is positive.
The velocity is negative.
The velocity is zero.
The object is moving away from the original position.
The object is moving towards the original position.
What are "The velocity is positive." and "The object is moving away from the original position."?
The straight line distance with direction between two points or objects.
What is displacement?
What is the rate at which objects accelerate toward the Earth? (Hint: number and units)
What is 9.8 m/s2 or 32.2 ft/s2? (Gravitational acceleration)
Solve for the velocity for 10-15 seconds on Graph 1. You must include units with your answer.
What is v = (15 ft - 5 ft) / (5 s) = 10 ft / 5 s = 2 ft/s?
Solve for the acceleration for 5-10 seconds on Graph 2. You must include units with your answer.
What is a = (5 ft/s - 5 ft/s) / (5 s) = 0 ft/s / 5 s = 0 ft/s2?
If the slope of a velocity versus time graph is negative, copy down ALL of the TRUE statements:
The acceleration is positive.
The acceleration is negative.
The acceleration is zero.
The object is speeding up.
The object is slowing down.
What is "The acceleration is negative." and "The object is slowing down."?
The change in an object's position over time.
What is velocity?
The length of a path an object has actually travelled.
What is distance?
Solve for the velocity for 15-20 seconds on Graph 1. You must include units with your answer.
What is v = (20 ft - 15 ft) / (5 s) = 5 ft / 5 s = 1 ft/s?
Solve for the acceleration for 10-15 seconds on Graph 2. You must include units with your answer.
What is a = (20 ft/s - 5 ft/s) / 5 s = 15 ft/s / 5 s = 3 ft/s2?
A horizontal line on a velocity versus time graph represents that the object is speeding up, slowing down, stopped, or traveling at a constant speed.
What is traveling at a constant speed?
The change in an object's velocity over time.
What is acceleration?
A number that has magnitude only. It answers the question "How much?"
What is a scalar quantity?
Solve for the velocity for 5-10 seconds on Graph 2. You must include units with your answer.
Solve for the acceleration for 15-20 seconds on Graph 2. You must include units with your answer.
What is a = (20 ft/s - 20 ft/s) / (5 s) = 0 ft/s / 5 s = 0 ft/s2?
A horizontal line on a position versus time graph represents that the object is walking away from the original position, walking towards the original position, stopped, accelerating, or decelerating.
What is stopped?
What is mechanics?
A number that has magnitude and direction. It answers the questions "How much?" and " Which way?"
What is a vector quantity?
Solve for the velocity for 15-20 seconds on Graph 2. You must include units with your answer.
What is 20 ft/s?
Solve for the acceleration for 0-15 seconds on Graph 1. You must include units with your final answer.
What is a = (2 ft/s - 0.5 ft/s) / (15 s) = 0.1 ft/s2?
v (0-10s) = (5 ft - 0 ft) / 10 s = 0.5 ft/s
v(10-15s) = (15 ft - 5 ft) / 5 s = 2 ft/s
The velocity of a ball after 2 seconds in ft/s when dropped from a building.
What is 32.2 ft/s2 * 2 seconds = 64.4 ft/s?