Physics Kinematic A

Question 1

What is a scalar?

Answer 1

No direction.

Question 2

What is a vector?

Answer 2

Have direction (position, displacement, velocity, acceleration).

Question 3

Define uniform motion.

Answer 3

Constant speed, constant direction.

Question 4

Define non-uniform motion.

Answer 4

Changing speed, changing direction.

Question 5

What is the acceleration due to gravity when a ball is dropping?

Answer 5

9.8 m/s².

Question 6

If an object starts from rest, what is its initial velocity (Vi)?

Answer 6

0 m/s.

Question 7

What is the method to calculate maximum height?

Answer 7

ADD ALL X COMPONENTS, ADD ALL Y COMPONENTS, THEN FIND D r.

Question 8

How do you add vectors?

Answer 8

Tail to tip.

Question 9

How do you subtract vectors?

Answer 9

Tail to tail.

Question 10

What is free fall?

Answer 10

Motion of an object when it is moving only under the influence of gravity.

Question 11

How do you calculate average velocity in two dimensions?

Answer 11

Total displacement in two dimensions divided by time interval (v av=d/t).

Question 12

How do you find change in velocity in 2D?

Answer 12

Separate velocity vectors into components and subtract using vector property vf-vi=vf+(-vi).

Question 13

What is uniform circular motion?

Answer 13

Occurs when an object moves in a circular path at constant speed.

Question 14

What is instantaneous velocity in circular motion?

Answer 14

Tangent to the circular path and has constant magnitude.

Question 15

What is the direction of acceleration in uniform circular motion?

Answer 15

Directed radially inward.

Question 16

What is centripetal acceleration?

Answer 16

Center seeking acceleration.

Question 17

What is the formula for centripetal acceleration?

Answer 17

ac = v²/r.

Question 18

What does ‘f’ represent in centripetal acceleration?

Answer 18

Frequency in Hz.

Question 19

How do you convert revolutions to frequency?

Answer 19

rev/60 = Hz.

Question 20

What is the centripetal acceleration of a child on a merry-go-round 3.0 m from the center with a speed of 2.0 m/s?

Answer 20

1.3 m/s² inwards.

Question 21

What is the centripetal acceleration formula involving frequency?

Answer 21

ac = 4π²rf².

Question 22

What is the centripetal acceleration of an ant sitting at the edge of a vinyl record rotating at 33.3 rpm?

Answer 22

185.45 cm/s² inwards.

Question 23

What is the path of a projectile when dropped from a vertical height?

Answer 23

Parabolic path.

Question 24

What motion components must always be split when dealing with projectile motion?

Answer 24

VX and VY.

Question 25

In projectile motion, which component is used for time?

Answer 25

Y components.

Question 26

What remains constant during horizontal motion of a projectile?

Answer 26

Velocity (Vx).

Question 27

What is the acceleration in the vertical direction of projectile motion?

Answer 27

a due to gravity.

Question 28

What is the value of g?

Answer 28

9.8 m/s².

Question 29

What is the relationship between horizontal and vertical motion in a projectile?

Answer 29

Independent.

Question 30

What is the total time of motion in projectile motion determined by?

Answer 30

Y components.

Question 31

What does 'dy' represent in the equations of projectile motion?

Answer 31

Vertical displacement.

Question 32

What does 'dx' represent in the equations of projectile motion?

Answer 32

Horizontal displacement.

Question 33

All motion is ______.

Answer 33

Relative.

Question 34

What does the point of view of motion describe from?

Answer 34

Frame of reference.

Question 35

What is the most common frame of reference assumed to be?

Answer 35

Earth, which is assumed to be stationary.