Kinematics Test

Mrs. Tripp "accidentally" dropped Alex's phone from the 3rd floor window one day when she would not stop texting in class. With what acceleration would her phone fall?

-9.8m/s2

Maya is walking around a corner, Sam is walking at a constant velocity, Logan is speeding up, and Amanda is slowing down. Who is NOT accelerating?

Sam

Which of the following is true of accelerating objects?

Objects that are accelerating are changing their velocity

Which of the following is an appropriate unit for acceleration?

m/s2

Kaleb is rushing to get to class before the bell rings. Starting from rest, he accelerates to 3 m/s in 2 seconds. What is his acceleration?

1.5 m/s2

Maddie and Jaydah go for a race. They both accelerate for 5 seconds. Maddie accelerates at a rate of 2 m/s2 and Jaydah accelerates at 1.5 m/s2. Who will have the largest velocity after the 5 seconds?

Maddie

Mitchell is driving Andrea to track practice. He slams on the breaks to avoid hitting a deer! Because his car was slowing down, what direction will Andrea's body move?

forward

Adam is roaming the halls on the third floor. He goes around a corner at the spine traveling at a constant velocity. Why does this mean he is accelerating?

Going around a corner changes the direction of his velocity.

if Ryan dropped his bag from the second floor spine and it took 1.0 seconds to hit the floor, what would be the final velocity right before impact with the floor?

-9.8m/s

How does the displacement of an object in freefall change as it is falling each second?

The displacement will increase each second as the object will be traveling faster each second of its freefall.

What was the name of the scientist who conducted the famous gravity experiment by dropping objects of different mass from the leaning tower of Piza?

Galileo

In a vacuum (no air resistance) a bowling ball, a basketball, and a feather are dropped from the same height. Which will hit the ground first?

They will all hit the ground at the same time.

_____ is a straight line that connects the starting and end points of a trip.

Displacement

_____ is speed with a direction

Velocity

_____ measures the change in velocity.

Acceleration

When an object is thrown upwards, the velocity at its highest point is _____.

0 m/s

When an object is thrown upwards, on the way up the the velocity is positive and the acceleration is negative, meaning the object will be _____.

slowing down

When an object is thrown upwards, on the way down the velocity is negative and the acceleration is negative, meaning the object will be _____.

Speeding up

What is the acceleration of a object with a constant velocity?

0m/s2

During what time frame does the object have a negative acceleration?

15-40 sec

During what time frame does the object have an acceleration of 0 m/s2?

10-15 sec

During which time frame does the object have the greatest acceleration?

0-10 sec

Which of the following would not change momentum

constant velocity

What is the formula for momentum?

p = mv

_____ is an object's location at an exact moment of time.

Position

Which of the following is NOT a unit for speed?

minutes

You ride your bike 8m in 3 seconds, take a 2 second break, then ride 12m in 5 seconds. What was your average speed?

2 m/s

The speed of an object at an exact moment is called _____.

instantaneous speed

When an object covers equal distances in equal amounts of time, it has a _____.

constant speed

What was the velocity of the bus at point E?

5 m/s through town

When you walk at an average speed of 4 m/s, in 5 s you'll cover a distance of

20 m

Which has more momentum? a fast pitch or a putting a golf ball slow

fast pitch

mass

measured in kilograms, kg. Amount of matter in an object

Delta symbol represents?

a change in something

A 4 kg ball is traveling at 4 m/s. What is its momentum?

16 kg m/s

How can two objects traveling at the same speed have different velocities?

They are traveling in different directions

if an object is speeding up it has a __________ momentum.

increasing

What does the slope of the graph above represent?

velocity

What is the displacement of the object at t = 10 seconds?

75 m

what is the speed of the blue object at t=1 second

5 m/s

A long-distance runner maintains his speed of 5 miles/hour. How far would he travel in 3.5 hours?

17.5 miles

A goose travels of a speed at 2 miles/hour. How long would it take the goose to travel 16 miles?

8 hours

A turtle travels 30 meters in 4 hours. What is the turtle's speed?

7.5 meters/hour

distance formula

speed x time

constant speed

speed that does not change

Which runner finished in 8 seconds?

Juanita

How fast is a beetle that crawls 2 meters in 130 seconds?

0.02 m/s

How much time would it take for a jet travelling at 100 m/s to go 5000 meters?

50 s

An arrow travels 120 meters in 6 seconds. How fast is it traveling?

20 m/s

Some sharks can swim at average cruising speeds of three miles per hour. If a shark swam at that average speed for seven hours, how far would it have traveled?

21 miles

What is the equation if you are solving for distance?

D = S x T

What is the equation if you are solving for time?

T= D/S

The tree is 24 meters away from where you stand. It will take you 4 seconds to reach the tree. What is your average speed?

6 m/s

What is speed?

How fast something moves

What is distance?

How far something travels

What is a unit for distance?

Kilometers

What is a unit for distance?

7.5 meters / hour

How much time did it take Matthew to slow down to a complete stop, after traveling at 30 m/s. His acceleration is -12 m/s2.

2.5 sec

A car was going 80 m/s down the highway and has an acceleration of -10.0 m/s2 over a time of 3 seconds due to an accident. What is the final velocity of the car?

50 m/s

Which object represents zero acceleration?

D

Which graph shows the object standing still?

B

Which graph represents the greatest acceleration?

A

hr, min, s

Units for time

An object is traveling EAST and is SLOWING DOWN its acceleration is

Negative