Vectors
This is the difference between a scalar and a vector.
What is direction?
Motion that combines horizontal and vertical components is called this.
What is two-dimensional motion?
The slope of a position-time graph represents this.
What is velocity?
The acceleration of free-falling objects near Earth’s surface.
What is 9.8 m/s²?
The path followed by a projectile is called this.
What is a parabola?
A vector of 10 m east and 10 m north results in this displacement.
What is 14.1 m at 45° northeast?
The horizontal velocity of a projectile remains this (ignoring air resistance).
What is constant?
If a car accelerates at 2 m/s² from rest, its velocity after 5 seconds is this.
What is 10 m/s?
A ball dropped from rest takes this long to fall 37 m.
2.75s
A projectile launched horizontally at 10 m/s from a 45 m cliff lands this far away.
What is 30 m
The process of breaking a vector into horizontal and vertical parts.
What is resolving a vector
The x-component of a 25 m vector at 30° above the horizontal.
What is 21.7 m?
A runner moves 100 m east then 103 m west. His displacement is this.
-3m
An object thrown upward at 30 m/s has this acceleration at the top.
-9.8 m/s^2
A ball kicked at 20 m/s at 45° has this initial vertical velocity.
What is 14.1 m/s?
The graphical method of adding vectors is called this.
What is the tip-to-tail method?
A plane flies 200 km east, then turns 63° northeast and flies another 100 km. The total displacement is closest to this.
178.4 m
An object moving at constant velocity has this acceleration
What is 0 m/s²?
An object is thrown upward at 15 m/s. The total time in the air (before hitting the ground) is about this.
What is 3.1 seconds
A projectile fired at 60° and 30° with the same speed will have this in common
What is the same range?
If vector A = (3, 4) and vector B = (−4, 3), then their dot product is this.
What is 0 (they are perpendicular)?
A runner jogs 100 m at 30° north of east, then turns 120° to the right and runs 100 m more. The total displacement magnitude is this.
What is 173 m
A car traveling at 25 m/s takes 5 seconds to stop. Its acceleration is this.
What is -5 m/s²?
A stone dropped from a cliff strikes the ground at 39.2 m/s. The height of the cliff is about this.
What is 78.4 m?
A projectile is fired at 25 m/s at 60°. The time to reach maximum height is this.
What is about 2.2 seconds?