Bunnies
How Long Something Takes
What is Time
Displacement, velocity, and acceleration are categorized as this type of quantity.
What is a vector quantity?
An object that falls, is dropped, thrown, or launched (i.e., is only under the influence of gravity) is said to be in this state.
What is free fall?
What is projectile motion?
An angry mob attacks a physics teacher in effigy after receiving their grades. They push the figure of the teacher off of a building and it hits the ground 1.81 seconds later.
How tall is the building?
16 m or 16.1 m
A ball at rest rolls down a hill with a constant acceleration of 3 m/s2. What is the velocity after 4 seconds?
12 m/s
How Far An Object Goes
What is Distance
Distance, speed, and time are categorized as this type of quantity.
What are scalar quantities?
Distance traveled divided in a certain time.
What is speed?
A baseball moves horizontally at 45 m/s for 1.4 s. How far does the ball travel in this time?
63 m
A bowing ball and a tennis ball are released from the same height at the same time. This is the order in which they hit the ground.
Change in position of an Object; how far an object travels from its origin
What is Displacement
A ball is thrown straight up with a speed of 3.0 m/s. This is the maximum height reached by the ball.
What is 0.49 m?
The missing piece of Vf2 = _____ + 2a(Dx)
What is Vi2 ?
A parked car is started and accelerates at 9.54 m/s2 for 6.5 seconds. How far does the car go in this time?
201.5 m
A biker brakes from 21 m/s to a stop in 32.3 m. What is the biker's acceleration?
-6.8 m/s2
Displacement of an object in a certain time
What is Velocity
An object is moving along with a velocity of 1.21 m/s. It accelerates at 0.30 m/s2 for a time period of 2.02 s.
This kinematic equation can be used to find the displacement of the object in the problem above.
What is d = vit + 1⁄2 at2 ?
The speed of a sprinter (starting from rest) who accelerates at 1.5 m/s2 for 6 seconds.
What is 9 m/s?
A boulder falls from a cliff from a height of 35 m. What is the velocity as it hits the ground?
26.2 m/s down
A car increases its speed from 10 m/s to 20 m/s in 5 seconds. How far did it travel? (HINT: calculate acceleration FIRST!!)
75 m
Change in velocity in a certain time
What is Acceleration
An object object at rest increases its velocity to 0.32 m/s. It accelerates at a rate 1.81 m/s2 .
This kinematic equation can be used to determine the displacement of the object given the information above.
What is Vf2 = Vi2 + 2ad ?
This is the SI Unit for Acceleration
What is m/s2 ?
An arrow leaves a bow with a velocity of 42 m/s. 2.4 seconds later, it hits the target traveling at 34 m/s. How far did the arrow travel? (HINT: calculate acceleration FIRST! :)
a = -3.33 m/s2
d = 91.2 m
Melissa drops a penny off the Empire State building. The building is 354 m tall. How fast is the penny traveling when it hits the ground? (neglect air resistance)
83.3 m/s (~185 mph)
with air resistance: ~20 m/s (~45 mph)