PROJECTILE MOTION QUESTIONNAIRE

Question 1

Suppose that an airplane normally flying at 80 km/h encounters wind at a right angle to its forward motion—a crosswind. Will the airplane fly faster or slower than 80 km/h?

Answer 1

A crosswind would increase the speed of the
airplane and blow it off course by a predictable amount.

Question 2

What is the resultant of two perpendicular vectors?

Answer 2

the diagonal of a rectangle constructed with the two vectors as sides.

Question 3

The process of determining the components of a vector is called

Answer 3

Resolution (not important maybe)

Question 4

Two vectors at right angles that add up to a given vector are known as

Answer 4

components of the
given vector (2)

Question 5

is any object that moves through the air or
space, acted on only by gravity (and air resistance, if any).

Answer 5

Projectile

Question 6

What is the velocity if you roll a ball along a horizontal surface?

Answer 6

constant because no component of
gravitational force acts horizontally. (2)

Question 7

What happens to two balls released simultaneously–one ball drops freely while the other one is projected horizontally.

Answer 7

First answer: The ball’s horizontal component of motion remains constant.
Second answer: Both balls fall the same vertical distance in the same time. Because the vertical distance fallen has nothing to do
with the horizontal component of motion.

Question 8

The path traced by a projectile accelerating in the vertical direction while moving at constant horizontal velocity is a

Answer 8

parabola

Question 9

At the instant a horizontally pointed cannon is fired, a cannonball held at the cannon’s side is released and drops to the ground. Which cannonball strikes the ground first, the one fired from the cannon or the one dropped?

Answer 9

Both cannonballs fall the same vertical distance with the same acceleration g and therefore strike the ground at the
same time.

Question 10

Describe the downward motion of a
horizontally launched projectile.

Answer 10

The downward motion of a horizontally launched projectile is the same as that of free fall.

Question 11

What do you call the projectile’s path

Answer 11

Trajectory(2)

Question 12

For the component vectors of the cannonball’s motion,
the horizontal component is always the same and only
the vertical component changes.

Answer 12

reminder lang

Question 13

The angle at which the projectile is launched
affects the distance that it travels.

Answer 13

Range

Question 14

Projectiles that are launched at the same speed but at different angles reach what?

Answer 14

Different heights (altitude) above the ground, They also travel different horizontal distances,

Question 15

Maximum range is attained when
the ball is batted at an angle of
nearly 45°.

Answer 15

reminder lang 45 is the maximum rangre

Question 16

Without air resistance, the speed lost while the cannonball is going up equals

Answer 16

the speed gained while it is coming down.
(The time to go up equals the time to come down)

Question 17

A projectile is launched at an angle into the air. Neglecting air resistance, what is its vertical acceleration?

Answer 17

Its vertical acceleration is g because the force of gravity is downward.

Question 18

A projectile is launched at an angle into the air. Its horizontal acceleration?

Answer 18

Its horizontal acceleration is zero because no horizontal force acts on it.

Question 19

At what point in its path does a projectile have minimum speed?

Answer 19

The minimum speed of a projectile occurs at the top of its path. If it is launched vertically, its speed at the top is zero.

If it is projected at an angle, the vertical component of velocity is still zero at the top

leaving only the horizontal component.

Question 20

Describe how far below an imaginary straight-line path a projectile falls.

Answer 20

The vertical distance a projectile falls below an imaginary straight-line path increases continually with time and is equal to 5t² meters.