Practice quiz for Holt Science and Technology: Forces Motion and Energy: Chapter 2, Forces in Motion
Heavier objects
Bigger objects
All ojects fall at the same speed
Newton
Galileo
Aristotle
9.8 meters per second
8.9 Meters per second per second
9.8 meters per second per second
V = t - g so 10s - 9.8m/s/s = .2 m/s
V = t /g so 10s/9.8m/s/s = 1.02 m/s
V = t x g so 10s x 9.8m/s/s = 98 m/s
Air resistance
The marble is heavier
The feather is from a bird and birds fly
Sliding friction
Fluid friction
Rolling friction
The force of gravity multiplied by the force of air resistance
The force of gravity divided by the force of air resistance
The force of gravity minus the force of air resistance
When something falls at a constant rate because the downward force of gravity equals the upward force of air resistance
the velocity of a train as it passes the terminal
The velocity of an object after it has come to rest on the ground
Size and mass
Shape and mass
Size and shape
The astronaut is weightless
Both the astronaut and the spacecraft are in free fall.
They are in outer space where there is no gravity
When gravity is pulling an object down and no other forces are acting on it.
When something is falling out of an airplane
When something is falling, but it is weightless
When something is travelling in a straight path
When something is traveling in a curved path
When something is travelling in a circular or near circular path around something else.
Constant forward motion and free fall
Constant circular motion and free fall
Constant forward motion and constant circular motion
When something is travelling in a circular or near circular path around something else.
The vibration of a projectile
The curved path an oject follows when it is thrown or propelled near the surface of the earth.
Accelerating horizontal motion and constant vertical motion
Constant horizontal motion and vertical motion accelerating because of gravity
Free fall and accelerating horizontal motion
Newtons First Law of motion
Newton's second law of motion
Newton's third law of motion
Newtons First law of motion
Newton's second law of motion
Newton's third law of motion
The rocket engine pushes gases downward so the gases push the rocket upward with an equal force. Newton's Third Law
The gases flying out of the rocket engine push against the ground. Newton's Second law.
Heat rises. Newton's First Law.
Newton's first law of motion
Newton's second law of Motion
Newton's third law of motion
Because unbalanced forces act on it.
Because of gravity and air resistance.
All of the above. Gravity and air resistance provide the unbalanced forces.
The tendancy of all objects to resist any change in motion.
Change in speed over a period of time.
The one with less mass
The one that is traveling faster
The one with more mass
The amount of force acting on the object
The mass of the object
Both the mass of the object and the force acting on it
A = f x m
A = f / m
A = f + m
A = f - m
F = m x a
F = m - a
F = m / a