Speeding up, slowing down and changing direction is defined as
What is acceleration.
100
A tug of war that results in one team pulling the other across the line is an example of _____________ forces
What is unbalanced
100
What is accuracy judged by.
What is how close a value is to the true value
200
What is a precise measurment
What is a measurement that is exact as possible.
200
On a distance vs time graph the ling of an object at rest is _______
What is flat with a slope of zero
200
In a velocity vs time graph what does a flat line indicate
What is a constant speed.
200
Which of the following best shows balanced forces?
a.rock falling to the ground
b.stretched rubber band between 2 hands
c. person lifting a heavy rock
d. crash between a truck and a train
What is (b)
200
Convert 0.000053 to scientific notation
What is 5.3 X 10 -5
300
Why are SI (standard international) units considered consistent?
What is units that are used worldwide.
300
When the motion of an object is shown by a straight line on a distance vs time graph, the slope is ________
What is speed.
300
On a speed vs time graph a negative slope indicates what.
What is the object is slowing down.
300
The combination of all forces acting on an object is called the ______force
What is net
300
What SI prefix means 1/100
milli, centi, kilo, hecto
What is centi
400
What unit do we use to measure the height of a bookcase
a.kelvin
b. meter
c. kilogram
d. liter
What is a meter
400
The average speed of a runner who runs 100 meters in 2 minutes is
What is 50 m/minute
400
Which straight-line accleration indicates an increase in speed?
0m/s
-15 m/s
4 m/s2
What is 4 m/s2
400
If the net force acting on an object is zero then the object will
What is remain at rest
400
I a loaf of bread weighs 1,500 g. What is it's weight in kilograms
What is 1.5 kg
500
Convert the following number to scientific notation
5,800,000,000 cm
What is 5.8 X 10 9
500
A car moving a a speed of 55.0 mi/hr for 4 hours has traveled what distance?
What is 220 miles
500
Moving from 0 m/s to 25 m/s in 8 s what is the average accleration?
What is 3.1 m/s2
500
When an object starts to slow down you can assume it is due to what
What is the force of friction
500
Which question cannot be answered by an experiment?
a. does penicillin kill bacteria?
b. Is rabies caused by a virus?
c. Did a comet impact kill the dinosaurs?
d. Can radiation cause cancer?