Concept Questions
Vectors
1-D Kinematics
2-D Kinematics
Applications
100
Speed is this quantity of the velocity vector
What is magnitude?
100
A vector quantity has....
What is magnitude and direction?
100
This quantity is the rate at which velocity changes with time.
What is acceleration?
100
In projectile motion with no air resistance, this is the only acceleration experienced by the object.
What is acceleration due to gravity?
100
A helicopter flies 5 km north, 5 km west, then 5 km south, and 5 km east returning to its base. This quantity is zero.
What is its displacement?
200
These three quantities allow us to describe the motion of an object.
What is position, velocity, and acceleration?
200
Vector A in magnitude-angle notation is...
What is 25.0 at 36.9 degrees above the negative x-axis?
200
A car traveling at 20 m/s accelerates at 2 m/s² for 5 s. This is the car's final velocity.
What is 30 m/s?
200
A projectile is launched horizontally at 10 m/s from a height of 20 m. Ignoring air resistance, this is its horizontal velocity just before it hits the ground.
What is 10 m/s?
200
A paratrooper exits an aircraft moving at constant velocity. Ignoring air resistance before the parachute opens, this statement correctly describes the paratrooper's horizontal motion.
What is "the paratrooper moves with the velocity of the aircraft"?
300
Graphs A, B, and C represent the same object's motion.
This best describes the object's motion.
What is "the object is accelerating at a constant rate in the positive direction"?
300
Vector A = (3i + 4j) m and Vector B = (5i − 2j) m. This is the magnitude of the resultant vector A - B.
What is 6 m?
300
An object starts from rest and accelerates at 4 m/s² for 3 s. This is the distance it travels.
What is 18 m?
300
A ball is launched horizontally at 8 m/s from a 5.0 m high table. The time it spends in the air is approximately this value.
What is 1.0 s?
300
A reconnaissance drone simultaneously drops two identical sensors from the same height. One sensor is simply released while the other is launched horizontally. Ignoring air resistance, this describes when they hit the ground.
What is "they hit the ground at the same time"?
400
Graphs A, B, and C represent the motion of the same object.
This best describes the object's motion.
What is "constant negative acceleration causes the object to slow, come to rest, and speed up in the opposite direction"?
400
400
A runner moving at 8 m/s slows uniformly at -2 m/s². This is the time required to come to rest.
What is 4 s?
400
A ball is launched horizontally at 15 m/s from a 45 m high cliff. This is the horizontal distance from the base of the cliff where it lands.
What is 45 m?
400
A sniper observes a bullet traveling toward a target. Ignoring air resistance, this quantity changes continuously throughout the bullet's flight.
What is the vertical component of the bullets velocity?
500
In order to apply PRC equations 1,2, and 3, we must assume this.
What is "constant acceleration"?
500
A cadet walks 6 km east and then 8 km north. This is the direction of the cadet's resultant displacement measured north of east.
What is "10 km at 53 degrees north of east"?
500
An object has an initial velocity of 5 m/s and accelerates at 3 m/s² for 4 s. This is its average velocity during the interval.
What is 11 m/s?
500
A projectile is launched horizontally at 12 m/s from a height of 20. m. This is the speed of the projectile just before it hits the ground.
What is 23 m/s?
500
When solving 2-D kinematics problems, we can think in terms of two 1-D motions linked by time because of this.
What is "the independence of motion in perpendicular axes"?