Fun Physics Chapter 1-6

suppose you're coasting on level ground in a car at 60 km/h and apply the brakes until you slow to 40 km/h when you suddenly release the break the car tends to

continue moving at 40 km/h in the absence of forces

a rock is thrown up ward a 50 degrees with respect to the horizontal as it rises its vertical component of velocity

decreases.

the pressure in a liquid depends on liquid

density and depth

A ball tossed vertically upwards rises reaches its highest point and then falls back touts starting pint. during this time the acceleration of the ball is always

directed downward

an object is propelled along a straight line path by a force. if the net force were doubled the objects acceleration would

double

when gas in a container is squeezed to half its volume and the temperature remains the same the bass pressure

doubles

the earth pulls on the moon. Similarly the moon pulls on the earth evidence that the

earth and moon are simply pulling on each other and the earths and moons pulls comprise an action reaction pair.

Atmospheric molecules do not fly off into outer space because of

earth gravitation

the main difference between gases and plasmas has to do with

electrical conduction

the vole of matter comes mostly from its

electrons

during an eclipse of the sun the high ocean tides on the earth are

extra high

A satlite travels close to earth its speed is slower at this position. T or False

false.

which of the following is are vector quantities

force acceleration and velocity

a player hits a ball with a bat the action force is the impact of the bat against the ball. the reaction to this force it the

force of the ball against the bat

A light women and heavy man jumped from an airplane at the same time and open their same size parachutes at the same time. Which person will get to the state of zero acceleration first.

The light women.

A sheet of paper can be withdrawn from under a container of milk without toppling if the paper is jerked quickly this best demonstrates that

The milk carton has inertia

Early Greeks new to a fair approximation

The size of the moon the size of the earth the earth moon distance

a truly educated person is Knowledgeable about

science, the arts, and religion

a moving object has

speed, velocity, momentum, energy

when a load is placed on the middle of a horizontal beam supported at each end the bottom part of the beam undergoes

tension

the effects of scaling are beneficial to small creatures

that fall from great heights

A helium filled balloon released in the atmosphere will rise until

the balloon and surrounding air have equal densities

It is correct to say that impulse is equal to

the change in momentum

your weight is

the gravitational attraction between you and the earth

its just a sas hard to accelerate a care on the moon as it is to accelerate the same care on earth this is because

the mass of the car is independent of gravity

compared to the mass of a certain object on earth the mass of the object o the moon is

the same

a ball is thrown upwards and caught when it comes back down. neglecting air resistance its speed when caught is

the same as the sped it had when thrown upwards.

A Mack truck and a Volkswagen traveling at the same speed Clyde head-on. The impact force is:

the same for both

which pulls on the oceans of the earth with the greater force

the sun

planets would crash into the sun if it weren't for

their tangential velocities

a fan attached to an ice sail craft stalled on a windless day blows air into the sail that bounces backward upon impact the boat can

then mov in the direction of the wind impact force.

the synthesis of a large collection of information that contains well tested and verified hypotheses about certain aspects of the world is known as scientific

theory

Speed is not a vector quantity

true

n eath satellite is simply a projectile freely falling around the earth t or f

true

when an object is raised above the ground it gains a certain amount of potential energy. If the same object is raised twice as high it gains

twice as much potential energy

if you do work on an object in half the usual time your power output is

twice the usual power output

how many different elements are in a water molecule?

two

when a chocolate bar is cut in half its density is

unchanged

as and object freely falls downward, its

velocity increases

When a rock is thrown straight upwards gets the exact top of its path it's;

velocity is zero and it's acceleration is about 10 m/s per second.

As a high-altitude balloon sinks lower and lower into the atmosphere it undergoes a decrease in

volume

a balloon is buoyed up with a force equal to the

weight of air it displaces

atmospheric pressure is caused by the

wight of the atmoshpere

A piece of rope is pulled by two people in a tug of war each pulls with 400 N force what is the tension in the rope

400 N

tripling the linear size of an object multiplies its area by

9 and its volume by 27

the earth is closer to the sun in January than in july which accounts for the fact that the highest tides in the northern hemisphere occur in

winter

when a falling object has reached its termal velocity its acceleration is

zero

the vertical height attained by a basketball player who achieves a hang time of a full 1 second is about

1.2 meters

The gain in speed each second for a freefalling object is about

10 m/ second

what is the buoyant force acting on a 10-ton ship floating in the ocean

10 tons

about how high can water be theoretically lifted by a vacuum pump at sea level

10.3 meters

an apple falls from a tree and hits the ground 5 meters below. It hits the ground with a speed of about

10m/s

An airplane that flies at 100 km/h in a 100 km/h hurricane crosswind has a ground speed of

141 km/h

a rock suspended by a weighing scale weighs 5 N out of water and 3 N when submerged in water. What is the buoyant force on the rock.

2 N

if a projectile is fired straight up at a speed of 10 m/s the total time to return to its starting position is about

2 seconds

an empty roller coaster car at an amusement park takes 3 minutes to make its ride from start to finish. neglecting friction a fully loaded car would take

3 minutes

which of the following is not a compound? air ammonia water salt

Air

In science facts,

B) May Change

A truck is moving at a constant velocity. Inside the storage compartment a rock is dropped from midpoint of the selling and strikes the floor below. The Rock the floor

Exactly below the midpoint of the ceiling

Of force is a vector quantity because it has both

Magnitude and direction

if the speed of a moving object doubles then what else doubles?

Momentum

two objects A and B have the same size and shape but A is twice as heavy as B when they are dropped simultaneously from a tower they reach the ground at the same time but A has a greater

Momentum

in which case would you have the largest mass of gold? If your chunk of gold weighed 1 N on the

Moon

what prevents satellites such as the space shuttle form falling?

Nothing they continually fall all around the earth

thrown an object at an angle upward. with no gravity it will follow a straight line path. But because of gravity at the end of 1 second it is

about 5 m below the straight line

when you stand at rest on a pair of bathroom scales the readings on the scales will always

add to equal your weight

a strong spring is stretched 10 cm by a suspended weight. If the wight is doubled the spring will stretch

another 10 cm making the total stretch 20 cm.

a phonograph record player has a constant rotational speed. the speed of the record relative to the pickup needle is greates

at the beginning of the record( outside edge).

A ball connected to a string has the most potential energy

at the top of its path

in drinking soda or water through a straw we make use of

atmospheric pressure

you re driving down the highway and a bug splatters into your windshield. which undergoes the greater change in momentum the bug or car.

both do

the earths gravitational field extends

both inside and outside the earth and throughout the entire universe.

Arnold Strongman and Suzie Small each pull ver hard on opposite ends of a massless rope in a tug of war the greater force of the rope is exerted by

both the same interestingly enouph

water pressure is greatest against the

bottom of a submerged object

toss a baseball bat into the air and it wobbles about its

center of mass

the scientific method is most effective in

gaining organizing and applying new knowledge

consider drops of water that leak from a dripping faucet as the drops fall they

get farther apart

According to Newton the greater the masses of intreating objects the

greater the gravitational force between them

when a car is braked to a stop, its kinetic energy is transformed to

heat

An upright broom is easier to balance when the heavier end is

heist farthest form your hand

in science an educated guess is a

hypothesis

If the mass of the earth somehow increased with no change in radius your weight would

increase

as a woman holding her breath swims deeper and deeper beneath the waters surface her density

increases

if an objects mass is decreasing while a constant force is applied to the object, the accelreration

increases

when a twirling ice skater brings her arms inward her rotational speed

increases

compared to a 1-kg block of solid iron a 2 kg block of solid iron has twice as much

interia, mass and volume

whenever the net force on an object is zero its acceleration

is zero

A woman on the surface of the earth has a mass of 50 kilograms and a weight of 490 N. If the woman were floating freely inside a space habitat far away from earth she would have

less weight and the same mass

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

location

which are scalar quantities

mass volume and speed

the air in this room has

mass wight and energy

If an object has kinetic energy then it also must have

momentum

which is most responsible for the ocean tides

moon

10 seconds after starting from Rest an object falling freely downward will have the speed of about

more than 100 m/s

which of the folioing are electrically neutral

neutron

if you push far an hour against a stationary wake you do no work

on the wall

the tangential velocity of an earth satellite velocity

parallel to the surface of the earth

as a ball falls the action force is the pull of the earths mass on the ball the reaction force is the

pull of the balls mass on the earth.

a suction cup sticks to a wall it is

pushed to the wall by the atmoshpere

a rifle recoils from firing a bullet the speed of the rifles recoil is small because the

rifle has much more mass that the bullet