Final Exam

Question 0

The unit of acceleration in SI is

Answer 0

M/s^2

Question 1

What is the result of a net force of 2 newtons that acts on a mass of 1 kg on a frictionless table?

Answer 1

It will accelerate at a rate of 2m/s^2

Question 2

The term “at rest” means

Answer 2

Not moving

Question 3

Acceleration should be defined as the

Answer 3

Change in velocity per unit of time

Question 4

An object travels 8.0meters in the first second of travel, 8.0 meters again during the next second of travel and 8.0 meters again during the third second. It’s rate of acceleration is

Answer 4

0.0m/s^2

Question 5

For our everyday events, our frame of reference for motion is usually

Answer 5

The earth

Question 6

The same force is exerted on four balls of the same size, but different masses. A = 1kg B = 2kg C = 3kg D = 4kg. Which ball would have the greatest acceleration?

Answer 6

Ball A

Question 7

The change in position of an object is that objects

Answer 7

Displacement

Question 8

The property of objects to resist any change in their state of motion is called

Answer 8

Inertia

Question 9

A push or pull is a

Answer 9

Force

Question 10

What happens to the mass of an object if it is take from earth to the moon?

Answer 10

It remains the same

Question 11

The SI unit of force is the

Answer 11

Newton

Question 12

An object is dropped and is in free fall, Each second the object falls:

Answer 12

A greater distance than in the second before

Question 13

The velocity of an object when the clock reading is zero at the beginning of an experiment is the

Answer 13

Initial velocity

Question 14

The distance an object travels divided by the time it takes for it to go that distance is

Answer 14

Average speed

Question 15

The horizontal and vertical velocities of a projectile are

Answer 15

Independent of each other

Question 16

If a projectile could be launched in a perfect vacuum, it would travel the greatest horizontal distance if it is launched at an angle of ____ to the ground.

Answer 16

45 degrees

Question 17

A baseball is thrown from the shortstop to the first baseman. When the ball leaves the shortstops’.a hand it has a horizontal velocity of 20m/s. Since there is air resistance, how fast would the ball be going when the first baseman catches it?

Answer 17

Less than 20m/s

Question 18

The object attached to the string is being swung in a clockwise circular path as shown at the right. Assume the string breaks where the ball is positioned at the top. In which direction will the object be traveling an instant later.

Answer 18

The direction of the ball (in this case upward diagonal to the right)

Question 19

If an object was thrown at at 30 degree angle with respect to the surface of the moon (where there is no air), it’s horizontal velocity after leaving the astronauts gloved hand would

Answer 19

Stay the same

Question 20

A vector has

Answer 20

Both magnitude and direction

Question 21

An arrow is shot upward into the air at a 60 degree angle to the ground. At the very top of the arrows path:

Answer 21

It has no vertical velocity, but has horizontal velocity

Question 22

At what point does a projectile that was launched at some angle to the ground have the least overall velocity?

Answer 22

After half of its total time of flight

Question 23

A box is resting of the floor. Someone begins pushing on the box, but it does not budge. More force is applied and finally the box begins to move. After it starts moving , what does the person notice?

Answer 23

That static friction is greater than kinetic friction

Question 24

Some kid eats a whole peach and spits he pit straight out of his mouth from a second floor window. The pit woulda wits overall minimum velocity:

Answer 24

Just as it is spit out