Math
a squirrel runs 4.8 m across a lawn, stops, then runs 2.3 m back in the opposite direction. What is the squirrels's displacement from the start point.
2.5 m
International system of units
SI
What graph would you use to compare proportions or percentages?
Circle
How is speed defined
distance / time
What is ineria
tendency of an object to resist any change in its motion
How many deciliters are in 500 mL
5 dL
A measurement of the quantity of matter in an object
Mass
Calculate the density of an object having a mass of 17 g and a volume of 3cm cubed
5.7 g/cm cubed
a car, bicycle, mouse, and bug have the same velocity - which has the most momentum?
Car
Define newtons first law of motion (remember the two key words/phrases from our textbook definiton)
object moves at a CONSTANT VELOCITY unless an UNBALANCED FORCE acts on it
A car with a mass of 1200 kg has a velocity of 30 m/s west. What is the cars momentum?
36000 kgxm/s west
The distance and direction of the objects change in position
Displacement
On which of the following is SI based
- inches
- powers of five
- english units
- powers of ten
Powers of ten
What is the SI unit for acceleration
m/s 2
an object always accelerates in the same direction as the ______
net force
A force of 3200 N west is applied to a 160 kg mass. What is the acceleration of the mass
20 m/s2 west
Gravity is the only force acting on an object
Free Fall
Explain whether the size of an objects displacement can be greater than the distance the object travels
No, it can be equal or less.
Describe the three ways you could change velocity on a walk through the park
speeding up, slowing down, changing direction
Coveres micro-welds - reduces friction
Convert 87 F to K & C
30 & 303
When one object exerts a force on a second object, the second object exerts an equal force in the opposite direction on the first object.
Newtons third law of motion.
List the steps of the scienctific method
State the problem
Gather information
Form a Hypothesis
Test a Hypothesis
Analyze the data
Draw conclusions
Which of the following represents the greatest speed: 20 m/s, 200 cm/s, or 0.2 km/s
0.2 km/s
What is the net force on a sky diver falling with a constant velocity of 10 m/s downward
0