question

An astronaut in space feels weightless.

answer

True

question

Every 8000m, the surface of the Earth drops an approximate vertical distance of 20m.

answer

False

question

A feather and a coin dropped in a vacuum fall with equal:

answer

acceleration

question

Weightlessness is the condition encountered in free fall wherein a support force is lacking.

answer

True

question

Work is the product of force and time

answer

False

question

Kinetic energy is the stored energy that a body possesses because of its position.

answer

False

question

A projectile is launched at an angle of 15 degree above the horizontal and lands downrange. what other projectile angle for the same speed would produce the downrange distance?

answer

75 degree

question

The principle which states that an immersed body is buoyed by a force equal to the weight of the fluid it displaces is:

answer

Archimedes' principle

question

The force that an object exerts on a supporting surface is called:

answer

support force

question

A machine with a power output of 500W, for every input of 1000W, is said to have an efficiency of 25%.

answer

False

question

If the mass of an object were to double while its volume remains the same, its density would:

answer

double

question

A freight train rolls along a track with considerable momentum. If it rolls at the same speed but has twice as much mass, its momentum is:

answer

double

question

A feeling encountered in free fall wherein a support force is lacking is called:

answer

weightlessness

question

Ice floating on water indicates that the the density of ice is:

answer

less than the density of water

question

The critical speed at which a projectile outruns gravity is called:

answer

escape speed

question

A coin and a feather dropped in a vacuum will have the same momentum.

answer

False

question

According to Newton, the greater the distance between masses of interacting objects, the:

answer

less the gravitational force between them

question

If you push an object just as far while applying twice the force, you do:

answer

twice as much work

question

The critical speed at which a projectile outruns gravity is called terminal speed.

answer

False

question

When you are on the way of a fast moving object and can't get out of its way, you will suffer a smaller force of impact if you decrease its momentum over a:

answer

long time

question

Work is the product of force and the distance through which the force moves.

answer

False

question

An Earth satellite is simply a projectile freely falling around the Earth.

answer

True

question

When a chocolate bar is cut in half, its density is:

answer

unchanged

question

If you double the velocity of a moving object with constant mass, its momentum will double.

answer

True

question

The pressure in liquid decreases with depth.

answer

False

question

Any completely immersed body displaces a quantity of fluid equal to its own weight.

answer

False

question

A completely submerged object displaces its volume of fluid.

answer

True

question

It takes relatively short time to boil water at higher altitude than at sea level.

answer

True

question

Any device that measures atmospheric pressure is called:

answer

barometer

question

Two objects move toward each other because of gravity. as the objects get closer, the force between them

answer

increases

question

Atmospheric pressure is:

answer

higher at sea level than at the top of a very high mountain

question

A car that travels twice as fast as another, when breaking to a stop will skid:

answer

four times as far

question

In the vacuum of outer space, there is no:

answer

atmospheric pressure

question

Barometer is any device that measures the density of materials.

answer

False

question

If the volume of an object were to double while its mass stays the same, its density would:

answer

halve

question

Ice tends to form at the bottom of bodies of water.

answer

False

question

Salty water is denser than fresh water.

answer

True

question

Force per unit area is called:

answer

pressure

question

Escape speed from a planet decreases with increase in the mass of the planet.

answer

False

question

An object that has potential energy may have this energy because of its:

answer

location

question

The horizontal speed of a projectile is influenced by gravity.

answer

False

question

The density of fish is equal to the density of water.

answer

True

test2 – Space – Flashcards

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