Physics Chapter 3 and 4 Test

If one object has twice as much mass as another object, it also has twice as much

inertia

There are two blocks of solid iron: one has a mass of 1-kg and the other 2-kg. The bigger block has twice as much

inertia, mass, volume

For an action force, there must be a reaction force that

is exactly equal in magnitude.

An object's weight may properly be expressed in units of

newtons

An object with a mass of 1000 kg accelerates at 2 meters per second per second. What is the magnitude of the net force exerted on the car?

2000 N

A karate chop delivers a blow of 3000 N to a board that breaks. The force that acts on the hand during this event is

3000 N

You are throwing a bowling ball of 2 kg with an acceleration of 2 m/s2. How much force you have applied on the ball?

4 N

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

500 N

The newton is a unit of

force

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

increases.

A tow truck exerts a force of 4000 N on a car, accelerating it at 2 meters per second per second. What is the mass of the car?

2000kg

An archer shoots an arrow. Consider the action force to be the bowstring against the arrow. The reaction to this force is the

arrow's push against the bowstring.

What is the net force on an 800-kg airplane flying with a constant velocity of 160 km/hour north?

0 N

The force of friction on a sliding object is 100 newtons. The applied force needed to maintain a constant velocity is

100 N.

What kind of motion does a constant, non-zero net force produce on an object of constant mass?

constant acceleration

Compared to the mass of a certain object on Earth, the mass of the same object on the moon is

the same

If an object moves with a constant velocity, we can conclude that

there is no net force acting on it, or the net force acting on it is zero.

A 1000-N skydiver opens his parachute and experiences an air resistance force of 300 N. The net force on the parachutist is

700 N downward

A 100-N falling object encounters 22 N of air resistance. The net force on the object is

78 N

A ball with a weight of 20 N is thrown vertically upward. What is the acceleration of the ball just as it reaches the top of its path?

9.8 m/s/s downward

When a snowflake falls, it quickly reaches a terminal velocity. This happens because

Its friction with air makes the net force zero in ashort time

The same net force is applied to object A and object B. The observed accelerations of the two objects are not the same; object A has an acceleration three times that of object B. Which of the following is correct?

Object A has one-third the mass of Object B

A heavy person weighting 1000 N and a light person weighting 500 N jumping together with same-size parachutes from the same altitude. Who will reach the ground first?

The heavy person

An object is pulled northward by a force of 10 N and at the same time another force of 15 N pulls it eastward. The magnitude of the resultant force on the object is

about 18 N.

If the mass of an object does not change, a constant net force on the object produces constant

acceleration

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

both the same, interestingly enough. 0 Mass * Acceleration = 0 Net Force

A force is a vector quantity because it has both

magnitude and direction

A kilogram is a measure of an object's

mass

Where would you have the largest mass of potato? If you have a bag of potato weighed 10 N on the...... [imagine you are weighing things with a spring scale on different planets]

moon

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

pull of the ball's mass on the Earth.

Your weight is

the gravitational attraction force between you and the Earth.

It is difficult to accelerate a mass of say 1000 kg on a level surface on the moon as it is here on the Earth. This is because

the mass of the object is independent of gravity.

An object is propelled along a straight-line path by a force. If the net force were doubled, the object's acceleration would be

twice as much

A parcel is being dropped from a plane. As its velocity of fall increases, parcel's acceleration

decreases, due to air resistance