Scientific Problem Solving
What are the 3 main branches of science?
life, earth, and physical science
What is needed to describe the position of an object?
distance, a reference point, and a reference direction
What kind of forces are acting on a book resting on a table?
Balanced
The transfer of energy that occurs when a force makes an object move.
work
A material that allows the flow of electrons.
conductor
A statement of what will happen next in a series of events?
prediction
A runner the 1600m run on the track (4 laps). What is her displacement?
0m
During the junior/senior rope pull, the seniors apply a force of 215 N to the left and the juniors apply a force of 200 N to the right. What is the net force and who wins?
15 N to the left
Seniors win
How do simple machines make doing work easier?
Multiply input force, change the distance the force is applied, change the direction of the force.
A build up of charge on an object.
Static electricity
An interpretation of observations.
explanation
What are the different ways an object can accelerate?
speed up, slow down, change direction
For any object, the greater the force that's applied to it, the greater its _____ will be.
mass
What does gravitational potential energy depend on?
mass, height, acceleration due to gravity
I have a strand of christas lights and half of the strand is out. What type of circuit does it contain.
2 series circuits wired in parallel
Convert 0.00076 to scientific notation.
7.6 X 10-4
10 m/s West is a unit for ________.
velocity
A swimmer pushes backwards against the water to move forward. The swimmer moving forward is which force?
reaction force
What is the kinetic energy of a skier if his mass is equal to 55.0 kg and he is moving at a speed of 3.50 m/s? (round your answer according to the significant figure rules)
337 J
Which scientist discovered that electricity is a form of energy.
James Prescott Joule
How many significant figures does the number 0.04 have?
1
How long in seconds will it take Hulk to reach Iron Man if he travels 1200 m at a speed of 50.0 m/s?
24 seconds
What is the acceleration of Santa's sleigh if it has a mass of 2000 kg and the force acting on the sleigh is equal to 60,000 N?
30 m/s2
The input work you do on a machine is 20J. The machine multiplies your work to 50J. What is the efficiency?
This is not possible
Machines can't create energy
What is the current in a ciruit if the voltage is 9.0 V and the resistance is 6.2 ohms?
1.5 amps