Describing Motion
when distance of an object changes in relation to another object
What is motion?
the formula for calculating speed
What is:
Speed = Distance/Time
the rate at which velocity changes
What is acceleration?
A train travels 168 km in 4 hours. Find its speed.
What is 42 km/hr?
Velocity of the object
What are speed and direction?
a place or object used for comparison to determine if something is in motion
What is a reference point?
the speed and direction of an object's motion
What is velocity?
the formula for calculating acceleration
What is:
Acceleration = Final velocity - Initial velocity/Time
The bus travels from Mercymount to the Boston Aquarium at a speed of 50 km/hr and returns from the aquarium back to school at a speed of 30 km/hr. Find its average speed during the journey.
What is 40 km/hr?
Earth’s plates move slowly.
What its the Theory of Plate Tectonics?
a system of measurement based on multiples of ten and on established measures of mass, length, and time
What is the International System of Units (SI)?
one 1,000th of a meter
What is a millimeter?
another word for decreasing speed
What is deceleration?
Rachel traveled 240 km in 4 hours by train and then traveled 120 km in 3 hours by car and 3 km in 1/2 hour by cycle. What is the average speed during the whole journey?
What is 48.4 km/hr?
Speed that does not change.
What is constant speed?
the basic SI unit of length
What is the meter?
4,000 m = ______ km
What is 4 km?
Acceleration refers to one of three types of movement, including:
1. increasing speed
2. ________________________________
3. ________________________________
What is decreasing speed and change in direction?
A roller coaster is moving at 25 m/s at the bottom of a hill. Three seconds later it reaches the top of the hill moving at 10 m/s. What is the acceleration of the coaster?
What is -5 m/s2?
What is no movement or rest?
the distance an object travels in one unit of time
What is speed?
20 m = ________ mm
What is 20,000 mm?
A car approaching a red light.
What is deceleration?
A plane reaches 40m/s in 5 seconds during takeoff. What is it's acceleration
What is 8 m/s2?
The Earth's outer crust is made up of these.
What are plates?