Lecture 4 Kinematics II Acceleration

Question 1

What is acceleration?

Answer 1

Measure of the rate of change of velocity with respect to time
Vector quantity

Question 2

If there is a change in velocity (either magnitude or direction) then there is _____

Answer 2

Acceleration

Question 3

The direction of the acceleration tells you which way the velocity is ______

Answer 3

Changing

Question 4

If acceleration and velocity are in the same direction, velocity will _______ in that direction over time

Answer 4

Increase

Question 5

If acceleration and velocity are in opposite directions, velocity will _________ over time until the person and/or object __________

Answer 5

Decrease
Stops or changes direction

Question 6

Projectiles follow a ________ path throughout their flight

Answer 6

Parabolic

Question 7

Projectiles undergo a constant vertical acceleration of -9.81m/s2 due to ______
Horizontal acceleration remains ______

Answer 7

Gravity
Constant

Question 8

If the launch height and landing height are equal:

Answer 8

• The time from lunch to apex is equal to the time between apex and landing
• The horizontal displacement from the launch point to apex is equal to the horizontal displacement from the apex to the landing point

Question 9

If launch point is higher than landing point, time between launch point and apex will be ______ than the time between apex and landing point

Answer 9

Shorter

Question 10

If landing point is higher than the launch point, time between launch point and apex will be ______ than time between apex and landing point

Answer 10

Longer

Question 11

When a person and/or object are undergoing acceleration, average velocity formulas are ____

Answer 11

Inaccurate

Question 12

If a person and/or object are not undergoing acceleration, average velocity formulas are ______

Answer 12

Accurate