A force consists of
A. a pull.
B. a push.
C. either a push or a pull.
D. none of the above.
What is C either a push or a pull?
100
Forces that are equal in size but opposite in direction are ____.
a. balanced forces c. inertial forces
b. frictional forces d. net forces
A- balanced force
100
Newton's first law of motion states that an object remains at rest unless a ____ force acts on it.
a. balanced c. gravitational
b. frictional d. net
D- Net
100
A push or a pull.
What is force?
200
If gravity did not affect the path of a horizontally thrown ball, the ball would ____.
a. go straight up c. fall straight down
b. travel horizontally d. follow a curved path
D- Follow a curved path
200
Whenever a body is in motion, there is always ____ to oppose the motion.
a. friction c. gravity
b. inertia d. acceleration
A- Friction
200
Every force has a(n) ____ force.
Opposite
200
A force that causes things to slow down or stop.
What is friction?
300
The unit of force is ____.
a. m/s c. the joule
b. the hertz d. the newton
D- the newton
300
The statement "for every action, there is an equal but opposite reaction" is a statement of ____.
a. the law of conservation of momentum
b. Newton's first law
c. Newton's second law
d. Newton's third law
D
300
Pulls objects to the center of the Earth.
What is gravity?
400
The force you have to overcome to start an object moving is ____.
a. rolling friction c. sliding friction
b. static friction d. air resistance
B- Static Friction
400
According to Newton's second law of motion, ____.
a. F = mv c. a = Fnet /m
b. F = m/a d. F = ma
C
400
A pulling force exerted on an object when it is stretched
Tension Force
500
A planet is discovered that is the same size as Earth and has the same gravitational acceleration, but has twice the mass. If you weigh 700 N on Earth, on the new planet you would weigh ____.
a. 350 N c. 1,400 N
b. 700 N d. 2,800 N
C- 1400 N
500
You throw a ball into the air. As the ball leaves your hand, the force(s) acting on it is/are ____.
a. gravity c. balanced
b. your hand d. gravity and your hand
D
500
Law stating that the acceleration of an object equals the net force divided by the object's mass