You trick-or-treated for 3 hours on Halloween. What was your average speed if you walked 9 kilometers that evening?
3km/hr
100
When a driver slams on the brakes in the car, they experience ____________ acceleration
negative acceleration or deceleration (decreasing speed)
100
If the speed of an object does not change, the object is traveling at a _________ speed.
constant
100
What does slope equal on a distance-time graph?
speed
100
Scientists around the world use the ____________, a system of measurement based on the number 10.
International System of Units
200
Find the velocity of a car in traffic that travels 10miles West in 2 hours.
5mi/hr West
200
When you pedal faster on your bike, you experience _____________ acceleration.
positive acceleration (increasing speed)
200
If 2 lines appear on the same distance-time graph, the line with the steeper __________ shows a greater speed.
slope
200
What does the slope equal for a speed-time graph?
acceleration
200
m
SI units for distance
300
How far away is the broom store if it took the witch 12 seconds to get there going at a speed of 2m/s?
24m (24 meters)
300
While playing basketball, Kobe Bryant has to turn in front of Kevin Garnett to slam dunk the ball. This is an example of what type of velocity change?
change in direction
300
The energy of motion
kinetic energy
300
What does a straight horizontal line on a distance-time graph show about the motion of an object?
object is stopped (speed = 0m/s)
300
m/s in a given direction
SI units for velocity
400
I drag race out of the school parking lot and accelerate from a standstill to 80km/hr in 10 seconds? What is my acceleration?
8km/hr/s
400
What does a straight, horizontal line on a speed-time graph show you about the acceleration of an object?
acceleration = 0m/s2 or the speed is constant
400
stored energy is kinetic or potential energy?
potential energy
400
The SI units are m on the y-axis and s for the x-axis for this type of graph:
distance-time graph
400
SI units for speed?
m/s
500
Suppose you ride your bike on a bike path. You travel 3km the first hour and 5km for the second hour. What is your average speed on a bike for the whole bike ride?
4km/hr
500
True or false. A carousel is an example of acceleration.
True because the direction is changing and the carousel stops (decreasing speed) to let additional riders on.
500
A car travels 30km in the 1st hour, and 60km in the next 2 hours. What is the average speed of the car's trip?
30km/hr
500
The SI units are m/s on the y-axis and s for the x-axis for this type of graph: