Speed / Velocity
Difference between speed and velocity
What is: velocity includes direction?
Define acceleration
What is: change in speed/velocity over some time?
3 fundamental forces of nature
What is: gravity, electromagnetic forces, nuclear forces?
Velocity of a roller coaster traveling 15 m northeast in 3.2 s. Extra 100 pts if answer in correct sig figs!
What is: 4.69 (4.7) m/s northeast?
Equation for speed and velocity?
What is: v = d / t?
Equation for acceleration
What is: a = (vf - vi) / t ?
Definition of friction
What is: the force that opposes motion between two objects in direct contact?
The distance a tree branch moved in 2 s during a storm if its velocity was 0.14 m/s. Extra 100 pts if answer in correct sig figs!
What is: 0.28 (0.3) m?
The time it took a rock being skipped across water to travel 6 m with a speed of 2.4 m/s. Extra 100 pts if answer in correct sig figs!
What is: 2.5 (3) s?
What is: negative accel = final speed slower than initial speed (slowing down); positive accel = initial speed slower than final speed (speeding up)?
Net force is balanced when this happens. Extra 100 points if you describe when a net force is unbalanced?
What is: = 0 (>0)?
Acceleration of a water bottle that was falling at 0.4 m/s, then after 5 s accelerates to 0.9 m/s
What is: 0.1 m/s2?
The average speed between two points: (5 m, 10 s) (20 m, 40 s)
What is 0.5 m/s?
A bowling ball has an initial speed of 0.6 m/s. Give an example of a final speed that would result in a negative acceleration.
What is: 0.599 or lower?
Two types of friction are these
What is: static friction and kinetic friction?
How long it took a bear running with an acceleration of 0.45 m/s2 to accelerate from 0.30 m/s to 2.1 m/s?
What is: 4 s?
The distance a dog ran in 4 s if its speed was 1.57 m/s?
What is: 6.28 m?
Acceleration between two points: (12 m, 6 s) and (35 m, 10 s)?
What is: 0.374 m/s2 ?
A bowling ball moving down a bowling lane has this type of friction
What is: rolling kinetic friction?
Initial velocity of a marble that's rolling across the floor at 0.7 m/s2 to the right in 6 s, if its final velocity was 0.1 m/s?
What is: -0.41 m/s to the right?