Chapter 3

Question 1

A dropped object increases by how much each second

Answer 1

9.8 ms

Question 2

An object thrown straight upward and at its max height has what velocity

Answer 2

Zero speed but changing direction

Question 3

When an on object si thrown vertically upward its accelerating either the way up or the way down

Answer 3

Both

Question 4

When a ball is thrown upward what are its velocity and acceleration at its highest point

Answer 4

Zero for velocity bc then it changes direction and comes back down and 9.8 for acceleration because of gravity and constant

Question 5

A person drops a stone from the window of a building one second layer she drops another stone how does the distance between the stones vary with time

Answer 5

It gets bigger bc the distance continues to increase and it projectile sigh no air resistance just gravity acting on it

Question 6

A baseball player hits a foul ball straight up into the aior and leaves the bat with a speed of 120 kmh in the absence of aid resistance how fast will the ball be traveling when the Cather catches it

Answer 6

120 kmh bc of symmetry

Question 7

As freely falling object speed up what is happening to its acceleration due to gravity does it increase decrees or stay the same

Answer 7

Stay the same

Question 8

Which one of these motions is not a constant acceleration a rock falling from a cliff an elevator moving from the second floor to the fifth floor making stops along turn way a dish resting on a table

Answer 8

The elevator bc it is accelerating and decelerating

Question 9

Can an object have zero velocity and nonzero acceleration at the same time

Answer 9

Yea is the acceleration is constant in the absence of air resistance bc of the gravitational pull, any thing in its Max height

Question 10

Is an airplane projectile motion

Answer 10

No

Question 11

Is a tennis ball lobbed over a net projectile

Answer 11

Yes

Question 12

Is a plastic disk sailing across a lawn projectile

Answer 12

No

Question 13

Is a hawk diving to catch a mouse projectile

Answer 13

Yes

Question 14

Is a parachute drifting to the earth projectile

Answer 14

No

Question 15

Is a frog jumping from land to water

Answer 15

Yes

Question 16

Is a flat rock skipping scored the surface of a lake parabolic motion

Answer 16

Yes

Question 17

Is a three point shot in basketball parabolic

Answer 17

Yes

Question 18

Is a space shuttle while orbiting earth parabolic

Answer 18

Yes

Question 19

Is a ball bouncing across a room parabolic

Answer 19

Yes

Question 20

Is a cliff diver parabolic

Answer 20

Yes

Question 21

Is a life preserver dropped form a stationary helicopter parabolic

Answer 21

No

Question 22

A bullet is fired horizontally from pistol and another bullet is dropped simultaneously from the same height if air resistance is negligent whcih bullet hits the go ground first

Answer 22

Teh same because of constant acceleration

Question 23

If a rock is dropped from the top of a sailboats mast will it hit the deck at the same point whether the boat is at rest or in motion. At constant velocity

Answer 23

Yes because of the constant velocity where the horizontal keeps up with teh boat bc of the constant velocity and teh Horixontal motion has no effect on gravity

Question 24

What is a projectile

Answer 24

An object in free fall where only gravity affect it and has horizontal .a component of motion

Question 25

Describe the path followed on air by any projectile

Answer 25

A parabola or part of a parabola

Question 26

What’s it eh relationship between the Horixontal ,motion and vertical motion of a projectile

Answer 26

No relationship independent of each other change one mad the other one isn’t affects

Question 27

What is the acceleration of a projectile in the air

Answer 27

9.8

Question 28

Horizontally is the velocity constant

Answer 28

Yes

Question 29

At a maximin height of a projectile what is the vertical acceleration and what is the Horixontal accerlarion

Answer 29

Vertical 9.8 and horizontal zero

Question 30

In archery should the arrow be aimed directly at the target how should your angle depend on the distance to teh target

Answer 30

No above bc gravity the net,e changes with distance it travels

Question 31

If two balls fall from the same height and one dropped and the other thrown horizontally at a speed of vx which ball will hit the ball first, which one will go further, and compRe teh speed of each ball when they hit the or young

Answer 31

They will hit the ground first because they both have a constant acceleration for same time and same height, b will go further bc it is is the horizontal distance plus the vertical distance, b is faster bc has vertical and horizontal distance added together

Question 32

When an object is thrown upward what is the difference between the speed returning to the starting point and the initial speed

Answer 32

Same