1 10 pt 15 pt 20 pt 25 pt 5 pt 10 pt 15 pt 20 pt 25 pt 5 pt 10 pt 15 pt 20 pt 25 pt 5 pt 10 pt 15 pt 20 pt 25 pt 5 pt 10 pt 15 pt 20 pt 25 pt 5 pt Kinematics Velocity-Time Graphs AccelerationFree FallingPractice

What is the formula for acceleration? 2

Acceleration = change in velocity/change in time 3

Explain the difference between v o and v f 4

v o starting velocity of object v f final velocity of object 5

Using the following formula how do you find final velocity? 6

Using your skills from algebra 7

Is acceleration a vector or scalar quantity? 8

Vector it has both magnitude and direction 9

If I have the following formula. How can I solve for acceleration? 10

2(x-v o t)/t 2 11

How do you create a acceleration graph? 12

Title x-axis: time y-axis: velocity 13

What does the slope of a velocity-time graph tell you? 14

x/y; velocity/time=acceleration 15

What does a negative slope mean? Positive? 16

Neg- slowing down Pos- speeding up 17

When an object is moving in the same direction with constant speed the line will be a? 18

Horizontal line 19

Find the acceleration between 0-5 seconds 5-10 seconds and 0-20 seconds 20

0-5= = =

What does it mean to have a negative acceleration? 22

The object is decreasing in velocity 23

If your direction is to the west, does your acceleration always have to be in the same direction? 24

No; if you’re accelerating your speed and acceleration are in the same direction but if you’re slowing down your direction is still forwards but your acceleration is backwards since you are decelerating 25

What is your acceleration if you are traveling at a constant velocity of 1.5m/s to the north? 26

Zero; you are not changing your velocity 27

A speedboat is traveling at 12m/s but begins to slow down over the next 30.s when it gets close to shore and travels around 1.5m/s. What is the speed boats acceleration 28

(1.5-12)/30 =-.35m/s 2 29

A bicycle travels in a straight line to the west with a velocity of 4.30m/s. After an acceleration of 1.30m/s 2 the bikes final velocity reaches 6.70m/s. In what time interval did this occur? 30

V=V o + at t=(V-Vo)/a ( )/1.30 =1.85s 31

A ball is thrown up into the air. What happens to the velocity as it travels through the air? What is the velocity at its maximum altitude? 32

33 The velocity decreases. Max altitude velocity equals zero

As a ball travels through the air what is the balls acceleration? Does it ever change? 34

9.8m/s 2 Only changes the velocity from positive to negative but acceleration is always in the same direction. (down) 35

When traveling in an elevator why do you feel pushed down when you travel up but not when you travel down? 36

Up= velocity and acceleration are in different directions Down=velocity and acceleration are in the same direction 37

A roller coaster is moving down at 1.30m/s when it experiences an acceleration downward traveling down a drop of 7.90m. What is the coasters final velocity? 38

39 V 2 =V o 2 + 2ax x(-9.8)x7.9 =12.5m/s

If you throw a ball into the air and then drop another at the same velocity. Will the balls hit at different velocities when heading the ground. Explain 40

No; what the one thrown up in the air gains it will lose it back on the way down to the starting point. So they are equal. 41

A whale travels to the north at 3.2m/s and reaches a final velocity of 4.5m/s after 4 seconds. What was the whales acceleration? 42

/4 =0.33m/s 2 43

A turtle traveling at 7.0m/s accelerates at a rate of 0.80m/s 2 for a interval of 3.0s. What is its final velocity? 44

V=V o +at 7+0.8x3 =9.4m/s 45

If the average acceleration of a duck is zero what can you say about the displacement of the duck? 46

Unknown you do not know what the velocity is. 47

How far do you run if your starting velocity is 3.00m/s and your final velocity is 6.00m/s and travel at a constant acceleration? 48

/2 13.5m 49

A rocket moves upward, starting from rest with an acceleration of 29.4m/s 2 for 3.98s. It runs out of gas at the end of the 3.98s but does not stop. How high does it rise above the ground? 50

51