Physics Unit 2

Question 1

Mass acted on by gravity is ________.

Answer 1

weight

Question 2

The thrust is opposite to the rocket’s weight, a force acting in a downward motion. These forces are equal but opposite in direction, illustrating _____.

Answer 2

Newton’s Third law of motion

Question 3

The rocket engine provides the thrust that makes the rocket travel upward. The thrust is a force that moves the rocket from one location to another.

Answer 3

motion

Question 4

The ______ on the rocket would include the thrust or upward force minus the rocket’s weight, which is the downward force acting upon the rocket, and all other forces acting on the rocket force.

Answer 4

net force

Question 5

At the point where a rocket reaches the top of the Earth’s atmosphere, the rocket has undergone ________ or a change in position including distance and direction.

Answer 5

displacement

Question 6

What does Newton’s second law of motion state?

Answer 6

The acceleration of an object acted upon by a constant force is directly proportional to the force and inversely proportional to the object’s mass. In addition, the acceleration occurs in the same direction as the applied force.

Question 7

A rocket moves in relationship to the stand that is attached to when it is launched. This is an example of _____.

Answer 7

relative motion

Question 8

If you divide a rocket’s change in distance by the change in time, you will have computer the rocket’s ______.

Answer 8

average velocity

Question 9

What does Newton’s first law of motion state?

Answer 9

Objects at rest remain at rest, and objects in motion continue in motion at the same velocity, unless acted upon by an outside force.

Question 10

As a rocket climbs through the atmosphere, it moves faster and faster. Its changing velocity is:

Answer 10

acceleration

Question 11

When a rocket is first launched, it sits still. Smoke from the burning fuel spills out of the bottom. The rocket is experiencing _______ or the tendency to stay at rest.

Answer 11

inertia

Question 12

A rocket moves in relationship to the stand that it is attached to when it is launched.

Answer 12

relative motion

Question 13

What is Newton’s third law of motion?

Answer 13

For every action there is and equal and oppositely directed reaction force.

Question 14

The fact that the rocket at first remains at rest is a representation of _____.

Answer 14

Newton’s first law of motion

Question 15

The propellant used in rockets is important. Liquid hydrogen has a low mass volume ratio or _______.

Answer 15

density

Question 16

The amount of force to propel the rocket is in the same direction as the motion.

Answer 16

vector

Question 17

The applied force is 6789 N while the force of friction is 451 N. What is the net force?

Answer 17

6338

Question 18

A large rocket will move 4500 meters in 1 second toward the heavens to attain a particular:

Answer 18

velocity

Question 19

The thrust force is greater than the rocket’s weight.

Answer 19

unbalanced force

Question 20

Gravity pulls down on the rocket.

Answer 20

force of indirect contact

Question 21

Rockets can be huge and therefore, heavy. For instance, a Stern V rocket has a ________ of 3038 500 kg.

Answer 21

mass

Question 22

All the forces acting on the rocket is the _____ force.

Answer 22

net

Question 23

If you divide a rocket’s change in velocity by the change in time, you will have computed the rocket’s _____.

Answer 23

average acceleration