Speed vs Velocity
This thing tells you how fast you're going, but not which way. what is it?
what does the slope of a positon-time graph represent?
speed or velocity
what is the basic definition of acceleration?
the rate at which velocity changes
what two factors determine an object's momentum?
mass and velocity
a car speeds up to pass a truck, is the car accelerating?
Which one cares about direction: speed or velocity?
velocity.
On a position-time graph, what does a horizontal line segment represent?
the object is at rest
what are the units commonly used to measure acceleration?
meters per second squared(m/s2)
if two objects have the same velocity, but object A has twice the mass of object B, which object has more momentum?
object A
ur waiting for a bus. the bus approaches, slows down, and stops. describe the bus's acceleration
the bus has negative acceleration
If ur driving 60km/h north, and when you turn around you drive 60km/h south, whats changed: ur speed or velocity?
velocity.
if a position-time graph shows a curves line getting steeper, what does that tell you about the object's motion?
the object is speeding up(accelerating)
a roller coaster is moving at a constant speed down a hill. is it accelerating?
a bowling ball rolls down a lane and hits the pins. describe what happens to the momentum of the ball and the pins during the collision
the bowling ball loses momentum, and the pins gain momentum
A skydiver jumps out of a plane. describe what happens to their velocity and acceleration as they fall before they open their parachute
their velocity increases downwards, while their acceleration remains constant downwards
A car travels 160km east in 2 hours, then 80k west in 1 hour. what is its average velocity for the entire trip?
32km/h east
describe the motion represented by a position-time graph that is a straight line sloping downwards
a car accelerates from 0 m/s to 20 m/s in 5 seconds. what is it acceleration?
4 m/s2
True or false: two objects with different masses can have the same momentum if their velocities are different
true
Draw the anatomy of a wave and label it.
drawings will vary depending on how they draw it.
A plane flies in a circular path with a constant speed of 480 km/h. after one complete circle, what is its average velocity?
0 km/h
Object A's position-time graph is a curve that slopes upward, getting steeper over time. object B's position-time graph is a straight line sloping upwards. which object has a greater velocity at the end of the time interval shown
object A
a cyclist increases their speed from 10km/h to 0km/h over a 5 seconds. what is their average acceleration?
2 km/h
if a 0.5 kg ball is rolling at 2 m/s and its momentum is halved, what is its new velocity?
1 m/s
why does a firefighter need to brace themselves when using a high-pressure fire hose?
the high velocity of the water creates significant momentum in the forward direction