Measurements
In physical science, a push or a pull is a:
force
Speed = Distance divided by what?
time
In physical science, a push or a pull is a:
force
The force that one surface exerts on another when the two rub against each other is called:
friction
Give 3 ways that velocity can change.
speed up; slow down; change direction
If you know speed and direction, you know the:
velocity
If you drove 300 km in 3 hrs, what would be your average speed?
100 km/hr
The rate at which velocity changes is:
acceleration
Air resistance is an example of:
friction
On a graph showing distance versus time, a horizontal line represents an object that is:
stationary [not moving]
The basic SI (metric) unit of length is the:
meter
!!DOUBLE JEOPARDY!!
A boy is watching a train pass by moving 50mph. He sees a girl in the train throw a baseball 30 mph. Whether the baseball is moving 50mph or 30 mph depends on your:
reference point [double click]
The Law of Universal Gravitation states that any two objets in the universe, without exception:
attract each other
What two forces keep the Earth in orbit around the Sun?
the Sun's gravity and the Earth's interia
The greater the mass of a moving object, the greater the __ it has.
inertia
Give the equation for finding Force.
Force = Mass X Acceleration
A 80 kg tire breaks loose from a wrecked truck. It hurdles down the highway at 9 km/sec. What is its force?
(Remember to give the proper unit in your answer.)
720 N
A place or object used for comparison to determine if something is in motion is called a:
reference point
Give an example of rolling friction.
[anything that rolls and slows]
The steepness of a slope on a motion graph depends on:
time, and or distance
You can show the motion of an object on a line graph in which you plot ___ against ___.
distance; time [time; distance]
If a bicyclist travels 30 km in two hours her average speed is:
15 km/hr
The tendency of an object to resist change in its movement is known as :
inertia
Speed is: /
Velocity is: +
Acceleration is velocity ____.
time + direction
changing (speed or direction)
You see a train pass by at 100 kph. Everything moving in the train seems to you, and is in fact to you moving at its speed in the train + 100 kph except for one thing. That thing is:
light