speed
If a car travels 60 km in 2 hours, what is its average speed?
30 km/h
Accelerations measures a change in what?
velocity
What is the formula for Density?
d= m/v
What makes Velocity different from speed?
The distance has direction
How many grams are in a kilogram
1000
Speed is calculated using what formula?
speed = distance/time
What is the formula for acceleration?
a= Vf-Vi/tf-ti
If an object has a mass of 50 g and a volume of 10 cm³, what is its density?
5g/cm3
A car travels 100 m east in 10 seconds. What is its velocity?
10 m/s east
A road is 3,200 meters long. How many kilometers is that?
3.2 km
A train moves 500 meters in 25 seconds. What’s its speed?
20 m/s
A car speeds up from 10 m/s to 30 m/s in 5 seconds. What’s its acceleration?
4 m/s²
If two objects have the same volume but different masses, which one has the greater density?
The one with the greater mass.
If an object changes direction but keeps the same speed, does its velocity change?
A backpack weighs 4,500 grams. What is its mass in kilograms?
4.5 kg
If a cyclist doubles both her distance and her time, what happens to her average speed?
it stays the same
If an object’s velocity doesn’t change, what is its acceleration?
0 m/s²
A rock has a density of 2.5 g/cm³ and a mass of 100 g. What is its volume?
40cm3
An airplane flies 300 km north in 1 hour, then 300 km south in the next hour. What is its average velocity?
0 m/s
A runner completes a marathon that is 42,195 meters long. How many miles did they run?
(1 mile = 1,609 meters)
26.2miles
A person jogs at a constant speed of 2.5 m/s for 10 minutes. How far do they travel?
1,500 m
A car slows from 25 m/s to 5 m/s in 4 seconds. What is its acceleration?
−5m/s2
An object with a mass of 300 g displaces 150 mL of water. Will it float or sink?
2.0g/mL; since water’s density is 1.0 g/mL, it sinks.
If a runner moves 400 m east in 80 s, then 400 m west in 80 s, what’s her total displacement?
0 m
A car travels 75,000 meters. Convert that distance into kilometers and then into miles.
(1 km = 1,000 m; 1 mile = 1.609 km)
Kilometers:75km
Miles:46.6miles