Quiz Q's answer1 Flashcards
A conversion fact for converting feet (ft) to centimeters (cm) is 1 ft = 30 cm. About how many feet are in 90 cm?
3 ft
How many centimeters are equal to the length of one meter?
100
How many milligrams are needed to have a mass of one gram?
1000
Natural philosophy emphasized using ____________ to understand nature.
reason
Express 52,000 in standard scientific notation.
5.2 x 10^4
The language and laws of motion were developed by
Newton
How fast you are moving is a property of motion known as
speed
How fast you are changing your speed or direction is a property of motion known as
acceleration
The average speed is given by the formula
v = d / t
A scalar has both a number and a direction.
FALSE
Your car slows from 60 mph to 30 mph in 2 seconds. The average acceleration is
-15 mph per second
An insect sitting on top of a record spinning on a record player undergoes which special kind of motion?
constant acceleration
A stationary object experiences a constant acceleration of 10 m/s2. How fast will it will be traveling after 3 seconds?
30 m/s
Ignoring air resistance, an object falling toward the surface of the earth has a velocity that is
increasing
Ignoring air resistance, an object falling toward the surface of the earth has an acceleration that is
constant
A heavy object and a light object are dropped from rest at the same time in a vacuum. The heavier object will reach the ground
at the same time as the lighter object.
A block of iron is transported to the moon. Which of the following is true?
Its mass remains the same but its weight decreases.
The gram is a unit of
mass
The newton is a unit of
force
The pound is a unit of
force
The tendency of a moving object to keep doing the same thing is called
inertia
Which of Newton’s laws states that forces act in pairs?
third law
