Constant Velocity
If a car travels 100 meters in 10 seconds, what is it's average velocity
10 m/s
What does it mean to have constant acceleration?
Constant change in velocity for a constant change in time.
When an object is in circular motion what direction is the acceleration?
Towards the center of the circle
What is the acceleration for an object in free fall?
9.8 m/s2
What is the definition of a projectile?
An object with only the force of gravity acting on it.
If a car is traveling at 20 meters per second, how much time will it take to go 200 meters?
10 seconds
If the the velocity and the acceleration of both positive what does that mean?
Speeding up
What is the equation for circular acceleration?
a = v2/r
A 5 kg block and a 10 kg block are in free fall. Which block hits the ground first?
Describe the motion of a horizontal projectile.
An object in free fall with a constant horizontal velocity.
What is the definition of constant velocity
traveling equal distance intervals over equal time intervals
If the velocity and acceleration of both negative what does that mean?
Speeding up
What does it mean for an object to have uniform circular motion?
Constant velocity in a circle.
When making a table of data for a free fall problem, what variables are in the table?
vi
vf
d
a
t
What is the horizontal acceleration of an object traveling as a horizontal projectile?
0 m/s2
What does constant velocity look like on a velocity-time graph?
Horizontal line
If an object is slowing down what does that mean about the velocity and acceleration?
Different signs
If you double velocity, what happens to the acceleration?
quadrupled
How much time does it take for an object to hit the ground if it is released from a height of 10 meters?
t = 1.43 seconds
Describe what happens to the vertical velocity of an object that is thrown up in the air and then returns to the ground.
velocity decreases to zero on the way up and then increases on the way down.
What does constant velocity look like on a displacement-time graph?
Line with a non-zero constant slope.
If an object is speeding up what does that look like on a distance vs time graph?
Curve with an increasing slope
In what direction is the velocity when an object is in uniform circular motion?
Tangent to the circle.
If an object is in free fall from a height of 10 meters, what is it's velocity right before it hits the ground.
14 m/s
What is the range traveled by a horizontal projectile with an initial horizontal velocity of 20 meters per second and a starting height of 30 meters?
t = 2.47 seconds
v = 20 m/s
d = vt = 20(2.47) = 49.5 meters