Equations
What is the first kinematics equation?
v=v0+at
A motorbike travels east and begins to slow down before a traffic light. In which direction is the motorbike's acceleration going?
What is west?
What are the units for displacement?
meters
value of acceleration due to gravity (in ENH Phys land)?
What is 10m/s2 down
During free fall, what is the acceleration of an object?
g or -10 m/s2?
What is the second kinematic equation?
x=x0+v0t+1/2at2 or ∆x = v0t+1/2at2
A person walks 8 km east during the first day, and 5 km west the next day. What is their net displacement?
What is 3 km?
What are the units for time?
seconds
The speed of something in a particular direction.
What is velocity?
An object that is dropped has an initial velocity of ___.
What is zero?
What is the 3rd kinematics equation?
v2=v02+2a(x-x0)
A stomp rocket takes 1.5 seconds to reach its maximum height. What was its initial velocity?
What is 14.7 m/s?
What are the units for velocity?
m/s
the rate of change of velocity.
What is acceleration
If a car is traveling at a velocity of 5 m/s, and slows to a stop, the final velocity is ____.
What is zero?
Which equation doesn't include time?
What is the 3rd kinematics equation?
What is the maximum height of a stomp rocket that has an initial velocity of 14.7 m/s?
What is 11.03m?
What are the units for acceleration?
m/s2
The net change in position.
What is displacement?
The final velocity of a cat thrown upward at its peak is = ?
What is 0.
What value is zero for a horizontal launch?
What is the v0y?
An ball is launched horizontally from a platform that is 15m high with a velocity of -12m/s. How long will it be in the air? What horizontal distance will the ball travel?
What is 1.7 seconds and -20.4m (-20. m).
What are the units for acceleration due to gravity?
m/s2
What is the difference between displacement and distance?
Distance - how far an object has travelled (total path length)
Displacement - how far an object is from the first position
An object moves at a constant acceleration of -5m/s2. This means that the object:
A. Increases speed 5m/s every second.
B. Decreases its speed by 5m/s every second.
C. has a positive acceleration.
D. moves 5 meters every second
B. Decreases its speed by 5m/s every second.