Introduction to Motion
True or False.
Sir Isaac Newton influenced Galileo Galilei
False.
The SI unit of force is the __________.
Newton
Fill in the blank.
The center-seeking force that causes an object to travel in a curved path is __________.
Centripetal force
The SI unit of work?
Joule
Early force-multiplying machines are called ____________.
Simple machines
How does vector quality and scalar quality differ?
Scalar quality has only a magnitude and vector quality has both magnitude and direction.
Which law of motion states the velocity of an object does not change unless the object is acted upon by an external force.
The first law of motion.
What is the formula for force of gravity?
force = G x (mass of object 1 x mass of object 2)/ distance2
F=G x (m1m2)/r2
What is the formula for work?
Work=force x distance
W=Fd
What is the formula for work input?
Work input = input force x input distance
What are the four different types of modern physics?
What is: quantum, mechanics, relativity, solid-state physics, and particle physics.
1 Newton can also be written as what?
N=kg x m/s2 or (kg x m)/ (s2)
What terms refers to the velocity at which a falling object stops speeding up?
Terminal velocity
Fill in the blank.
If force is applied in the direction, it is a ___________ force.
Positive
Fill in the blank.
The simple machine which is like an inclined plane that modifies the applied force and directs it to the side is the __________.
Wedge
What are the five different classic physics?
What is: mechanics, thermodynamics, optics, acoustics, and electromagnetism.
What force is required to accelerate a 3.4 kg object at 4.2 m/s2?
14.28N
Upon what two factors does friction depend?
1.Weight of the object
2. Nature of the surfaces in contact
What is the momentum, of a 5kg bowling ball rolling forward at 7 m/s?
35 kg m/s forward
What is the ideal mechanical advantage of an inclined plane with a length of 12m and a height of 3m?
4.0
What is the total displacement of an airplane that travels 1500. km west and then 600. km east?
900. km west
What is the magnitude of the force required to accelerate a 3,200 kg at 4 m/s2?
12,800 N
How far would a resting object fall if it were accelerated by Earth's gravity for 6.00 s?
d=176.58m
If 84 J of energy are transferred in 2.0 s, what is the power?
42 W
A car traveled 736 km west in 8.0 h. What was the car's velocity?
92 km/h west