ISCI Exam 1 - Study Group

If a freely falling object were somehow equipped with a speedometer, its speed reading would increase each second by about

10 m/s.

Ten seconds after starting from rest, a freely falling object on Earth will have a speed of about

100 m/s

A baseball player bats a ball with a force of 1000 N. The ball exerts a reaction force of

1000 N.

A 1-kg mass at Earth's surface weighs about

10N

The force of friction on a sliding object is 10 N. The applied force needed to maintain a constant velocity is

10N

A jumbo jet has a mas of 100,000 kg. The thrust for each of four engines is 50,000 N. What is the jet's acceleration in meters per second squared when taking off?

2

The average speed of a horse that gallops a distance of 10 km in a time of 30 minutes is

20 km/hr

A car has a mass of 1000 kg and accelerates at 2 m/s/s. What is the magnitude of the force exerted on the car?

2000 N

A 300-kg bear grasping a vertical tree slides down at constant velocity. The friction force between the tree and the bear is

3000 N.

What is the force of gravity on a 500-N woman standing on earth's surface?

500 N

A person is attracted toward the center of the earth by a 500-N gravitational force. The force of attraction of earth toward the person is

500N

A skydiver who weighs 500 N reaches terminal velocity of 90 km/hr. The air resistance on the skydiver is then

500N

An object is pulled northward with a force of 10 N and southward qwith a force of 15 N. The magnitude of the net force on the object is

5N

A block is dragged without acceleration in a straight-line path across a level surface by a force of 6 N. What is the force of friction between the block and the surface?

6 N

The weight of 0.6 kg of salami is about

6 N

If a car increases its velocity from 0 to 60 km/hr in 10 seconds, its acceleration is

6 km/hr/s.

The two measurements necessary for calculating average speed are

distance and time.

An object is place exactly halfway between earth and the moon. The object will fall toward the

earth

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 is the

force of the ball against the bat.

If a freely falling object were somehow equipped with an odometer to measure the distance it travels, then the amount of distance it travels each succeeding second would be

greater than the second before.

According to Newton, the greater the masses of interacting objects, the

greater the gravitational force between them.

If an object's mass is decreasing while a constant force is applied to the objct, the acceleration

increases

When the distance between two stars decreases by half, the force between them

increases to four times as much.

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

less the gravitational force between them.

A kilogram is a measure of an object's

mass

A Mack truck and a Volkswagen traveling at the same speed have a head-on collision. The impact force is greater on the

same for both

A car traveling at 00 km/hr strikes and unfortunate bug and splatters it. The force of impact is greater on the

same for both.

A light woman and a heavy man jump from an airplane at the same time and open their same-size parachutes at the same time. Which person will get to a state of zero zcceleration first?

the light woman

A sheet of paper can be withdrawn from under a container of milk without topplin it if the paper is jerked quickly. This demonstrates that

the milk carton has inertia.

As a ball falls, the action force is the pull of Earth's mass on the ball. The reaction force is

the pull of the ball's mas on Earth.

Compared with the mass of a certain object on earth, the mass of the same object on the moon is

the same

A heavy object and a light object are dropped at the same time in a vacuum. The heavier object reaches the ground

at the same time as the light object.

Arnold Strongman nd Suzie Small each pull very hard on opposite ends of a rope in a tug-of-war. The greatest force on the rope is exerted by

both the same, interestingly enough.

Which of the following is the definition for the term "mass"?

The amount of material contained within an object.

A Mack truck and a Volkswagen traveling at the same speed have a head-on collision. The vehicle to undergo the greatest change in velocity will be the

Volkswagen.

When graphing data, the independent variable should be placed on the

X axis.

Disregarding air resistance, objects fall at constant

acceleration

While a car travels around a circular track at constant speed, its

acceleration is changing.

An object travels 8 m in the first second, 8 m again during the second second, and 8 m again during the second second. Its acceleration is therefore

0 m/s/s = zero m/s/s

Arnold Strongman and Suzie Small have a tug-of-war on a polished floor. Arnold wears socks and Susie wears gym shoes. The likely winner is

Suzie

When graphing data, the point at which the X and Y axes meet must always be labeled as "0".

False

An object on which the sum of all the forces is zero is an object I. at rest. II. moving with constant velocity. III. having no acceleration.

I., II. and III.

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

Increase also.

An investigation was performed to see if corn seeds would sprout at different times depending on the temperature of the water in which they were placed. Identify the dependent variable in this experiment.

the sprouting time

When a squid pushed against the water, the squid moves forward because

the water pushed against the squid.

As an object freely falls, its

velocity increases.

When a falling object has reached its terminal velocity, its acceleration is

zero

A 10-N falling object encounters 10 N of air resistance. The net force on the object is

zero N